diff --git a/snapshots/updates.test.js.snap b/snapshots/updates.test.js.snap
index 6c39644..a2ff425 100644
--- a/snapshots/updates.test.js.snap
+++ b/snapshots/updates.test.js.snap
@@ -5,61 +5,51 @@ exports[`dual 1`] = `
   "npm": {
     "dependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "7.11.5",
         "old": "7.0.0",
       },
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "3 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "4.0.0-beta.11",
         "old": "4.0.0-alpha.2",
       },
       "jpeg-buffer-orientation": {
-        "age": "3 years",
         "info": "https://github.com/fisker/jpeg-buffer-orientation",
         "new": "2.0.3",
         "old": "0.0.0",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
       },
       "prismjs": {
-        "age": "4 years",
         "info": "https://github.com/LeaVerou/prism",
         "new": "1.17.1",
         "old": "1.0.0",
       },
       "react": {
-        "age": "1 year",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.2.0",
         "old": "18.0",
       },
       "styled-components": {
-        "age": "3 years",
         "info": "https://github.com/styled-components/styled-components",
         "new": "5.0.0-rc.2",
         "old": "2.5.0-1",
       },
       "svgstore": {
-        "age": "4 years",
         "info": "https://github.com/svgstore/svgstore",
         "new": "^3.0.0-2",
         "old": "^3.0.0",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -67,7 +57,6 @@ exports[`dual 1`] = `
     },
     "peerDependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "~7.11.5",
         "old": "~6.0.0",
@@ -75,7 +64,6 @@ exports[`dual 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^10.0.0",
         "old": "^1.0.0",
@@ -85,7 +73,6 @@ exports[`dual 1`] = `
   "pypi": {
     "dependencies": {
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -93,13 +80,11 @@ exports[`dual 1`] = `
     },
     "tool.poetry.group.dev.dependencies": {
       "PyYAML": {
-        "age": "1 year",
         "info": "https://github.com/yaml/pyyaml",
         "new": "6.0",
         "old": "6.0",
       },
       "djlint": {
-        "age": "2 months",
         "info": "https://github.com/Riverside-Healthcare/djlint",
         "new": "1.31.0",
         "old": "1.30.0",
@@ -114,7 +99,6 @@ exports[`dual 2`] = `
   "npm": {
     "dependencies": {
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
@@ -124,27 +108,13 @@ exports[`dual 2`] = `
 }
 `;
 
-exports[`exclude 1`] = `
-{
-  "npm": {
-    "dependencies": {
-      "updates": {
-        "age": "3 years",
-        "info": "https://github.com/silverwind/updates",
-        "new": "537ccb7",
-        "old": "6941e05",
-      },
-    },
-  },
-}
-`;
+exports[`exclude 1`] = `undefined`;
 
 exports[`exclude 2`] = `
 {
   "npm": {
     "dependencies": {
       "react": {
-        "age": "1 year",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.2.0",
         "old": "18.0",
@@ -159,7 +129,6 @@ exports[`exclude 3`] = `
   "npm": {
     "dependencies": {
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
@@ -174,7 +143,6 @@ exports[`exclude 4`] = `
   "npm": {
     "dependencies": {
       "gulp-sourcemaps": {
-        "age": "6 years",
         "info": "https://github.com/floridoo/gulp-sourcemaps",
         "new": "2.0.1",
         "old": "2.0.0",
@@ -189,55 +157,46 @@ exports[`greatest 1`] = `
   "npm": {
     "dependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "7.11.5",
         "old": "7.0.0",
       },
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "3 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "4.0.0-beta.11",
         "old": "4.0.0-alpha.2",
       },
       "jpeg-buffer-orientation": {
-        "age": "3 years",
         "info": "https://github.com/fisker/jpeg-buffer-orientation",
         "new": "2.0.3",
         "old": "0.0.0",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.1.4",
         "old": "3.1.0",
       },
       "prismjs": {
-        "age": "4 years",
         "info": "https://github.com/LeaVerou/prism",
         "new": "1.17.1",
         "old": "1.0.0",
       },
       "react": {
-        "age": "1 year",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.2.0",
         "old": "18.0",
       },
       "styled-components": {
-        "age": "3 years",
         "info": "https://github.com/styled-components/styled-components",
         "new": "5.0.0-rc.2",
         "old": "2.5.0-1",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -245,7 +204,6 @@ exports[`greatest 1`] = `
     },
     "peerDependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "~7.11.5",
         "old": "~6.0.0",
@@ -253,7 +211,6 @@ exports[`greatest 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^10.0.0",
         "old": "^1.0.0",
@@ -268,7 +225,6 @@ exports[`include 1`] = `
   "npm": {
     "dependencies": {
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
@@ -283,7 +239,6 @@ exports[`include 2`] = `
   "npm": {
     "dependencies": {
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
@@ -298,7 +253,6 @@ exports[`include 3`] = `
   "npm": {
     "dependencies": {
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
@@ -313,61 +267,51 @@ exports[`latest 1`] = `
   "npm": {
     "dependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "7.11.5",
         "old": "7.0.0",
       },
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "3 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "4.0.0-beta.11",
         "old": "4.0.0-alpha.2",
       },
       "jpeg-buffer-orientation": {
-        "age": "3 years",
         "info": "https://github.com/fisker/jpeg-buffer-orientation",
         "new": "2.0.3",
         "old": "0.0.0",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
       },
       "prismjs": {
-        "age": "4 years",
         "info": "https://github.com/LeaVerou/prism",
         "new": "1.17.1",
         "old": "1.0.0",
       },
       "react": {
-        "age": "1 year",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.2.0",
         "old": "18.0",
       },
       "styled-components": {
-        "age": "3 years",
         "info": "https://github.com/styled-components/styled-components",
         "new": "5.0.0-rc.2",
         "old": "2.5.0-1",
       },
       "svgstore": {
-        "age": "4 years",
         "info": "https://github.com/svgstore/svgstore",
         "new": "^3.0.0-2",
         "old": "^3.0.0",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -375,7 +319,6 @@ exports[`latest 1`] = `
     },
     "peerDependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "~7.11.5",
         "old": "~6.0.0",
@@ -383,7 +326,6 @@ exports[`latest 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^10.0.0",
         "old": "^1.0.0",
@@ -398,31 +340,26 @@ exports[`patch 1`] = `
   "npm": {
     "dependencies": {
       "gulp-sourcemaps": {
-        "age": "6 years",
         "info": "https://github.com/floridoo/gulp-sourcemaps",
         "new": "2.0.1",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "3 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "4.0.0-beta.11",
         "old": "4.0.0-alpha.2",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.1.4",
         "old": "3.1.0",
       },
       "svgstore": {
-        "age": "4 years",
         "info": "https://github.com/svgstore/svgstore",
         "new": "^3.0.0-2",
         "old": "^3.0.0",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -430,7 +367,6 @@ exports[`patch 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "5 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^1.0.6",
         "old": "^1.0.0",
@@ -445,61 +381,51 @@ exports[`prerelease 1`] = `
   "npm": {
     "dependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "7.11.5",
         "old": "7.0.0",
       },
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "3 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "4.0.0-beta.11",
         "old": "4.0.0-alpha.2",
       },
       "jpeg-buffer-orientation": {
-        "age": "3 years",
         "info": "https://github.com/fisker/jpeg-buffer-orientation",
         "new": "2.0.3",
         "old": "0.0.0",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.2.0-beta",
         "old": "3.1.0",
       },
       "prismjs": {
-        "age": "4 years",
         "info": "https://github.com/LeaVerou/prism",
         "new": "1.17.1",
         "old": "1.0.0",
       },
       "react": {
-        "age": "9 months",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.3.0-next-d1e35c703-20221110",
         "old": "18.0",
       },
       "styled-components": {
-        "age": "3 years",
         "info": "https://github.com/styled-components/styled-components",
         "new": "5.0.0-rc.2",
         "old": "2.5.0-1",
       },
       "svgstore": {
-        "age": "4 years",
         "info": "https://github.com/svgstore/svgstore",
         "new": "^3.0.0-2",
         "old": "^3.0.0",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -507,7 +433,6 @@ exports[`prerelease 1`] = `
     },
     "peerDependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "~7.11.5",
         "old": "~6.0.0",
@@ -515,7 +440,6 @@ exports[`prerelease 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^10.0.0",
         "old": "^1.0.0",
@@ -530,13 +454,11 @@ exports[`pypi 1`] = `
   "pypi": {
     "tool.poetry.group.dev.dependencies": {
       "PyYAML": {
-        "age": "1 year",
         "info": "https://github.com/yaml/pyyaml",
         "new": "6.0",
         "old": "6.0",
       },
       "djlint": {
-        "age": "2 months",
         "info": "https://github.com/Riverside-Healthcare/djlint",
         "new": "1.31.0",
         "old": "1.30.0",
@@ -551,61 +473,51 @@ exports[`release 1`] = `
   "npm": {
     "dependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "7.11.5",
         "old": "7.0.0",
       },
       "gulp-sourcemaps": {
-        "age": "4 years",
         "info": "https://github.com/gulp-sourcemaps/gulp-sourcemaps",
         "new": "2.6.5",
         "old": "2.0.0",
       },
       "html-webpack-plugin": {
-        "age": "5 years",
         "info": "https://github.com/jantimon/html-webpack-plugin",
         "new": "3.2.0",
         "old": "4.0.0-alpha.2",
       },
       "jpeg-buffer-orientation": {
-        "age": "3 years",
         "info": "https://github.com/fisker/jpeg-buffer-orientation",
         "new": "2.0.3",
         "old": "0.0.0",
       },
       "noty": {
-        "age": "5 years",
         "info": "https://github.com/needim/noty",
         "new": "3.1.4",
         "old": "3.1.0",
       },
       "prismjs": {
-        "age": "4 years",
         "info": "https://github.com/LeaVerou/prism",
         "new": "1.17.1",
         "old": "1.0.0",
       },
       "react": {
-        "age": "1 year",
         "info": "https://github.com/facebook/react/tree/HEAD/packages/react",
         "new": "18.2.0",
         "old": "18.0",
       },
       "styled-components": {
-        "age": "3 years",
         "info": "https://github.com/styled-components/styled-components",
         "new": "4.4.1",
         "old": "2.5.0-1",
       },
       "svgstore": {
-        "age": "5 years",
         "info": "https://github.com/svgstore/svgstore",
         "new": "^2.0.3",
         "old": "^3.0.0",
       },
       "updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "537ccb7",
         "old": "6941e05",
@@ -613,7 +525,6 @@ exports[`release 1`] = `
     },
     "peerDependencies": {
       "@babel/preset-env": {
-        "age": "3 years",
         "info": "https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env",
         "new": "~7.11.5",
         "old": "~6.0.0",
@@ -621,7 +532,6 @@ exports[`release 1`] = `
     },
     "resolutions": {
       "versions/updates": {
-        "age": "3 years",
         "info": "https://github.com/silverwind/updates",
         "new": "^10.0.0",
         "old": "^1.0.0",
diff --git a/updates.js b/updates.js
index e2c9236..9f9a61b 100755
--- a/updates.js
+++ b/updates.js
@@ -255,6 +255,15 @@ function getInfoUrl({repository, homepage, info}, registry, name) {
   return url;
 }
 
+function finishWithMessage(message) {
+  if (args.json) {
+    console.info(JSON.stringify({message}));
+  } else {
+    console.info(message);
+  }
+  doExit();
+}
+
 function doExit(err) {
   if (err) {
     const error = err.stack || err.message;
@@ -657,13 +666,14 @@ function matchersToRegexSet(cliArgs, configArgs) {
 
 function canInclude(name, mode, {include, exclude}) {
   if (mode === "pypi" && name === "python") return false;
+  if (!include.size && !exclude.size) return true;
   for (const re of exclude) {
     if (re.test(name)) return false;
   }
   for (const re of include) {
-    if (!re.test(name)) return false;
+    if (re.test(name)) return true;
   }
-  return true;
+  return false;
 }
 
 function resolveFiles(filesArg) {
@@ -951,7 +961,7 @@ async function main() {
   }
 
   if (numDependencies === 0) {
-    console.info("No dependencies found, nothing to do");
+    finishWithMessage("No dependencies found, nothing to do");
     doExit();
   }
 
@@ -961,7 +971,7 @@ async function main() {
   }
 
   if (!numEntries) {
-    console.info("All dependencies are up to date.");
+    finishWithMessage("All dependencies are up to date.");
     doExit();
   }
 
@@ -982,6 +992,7 @@ async function main() {
         throw new Error(`Error writing ${basename(filePerMode[mode])}: ${err.message}`);
       }
 
+      // TODO: json
       console.info(green(`✨ ${basename(filePerMode[mode])} updated`));
     }
   }
diff --git a/updates.test.js b/updates.test.js
index e215530..ef0f92b 100644
--- a/updates.test.js
+++ b/updates.test.js
@@ -109,13 +109,18 @@ function makeTest(args) {
     const {results} = JSON.parse(stdout);
 
     // Parse results, with custom validation for the dynamic "age" property
-    for (const dependencyType of [
-      ...dependencyTypes,
-      "tool.poetry.dependencies",
-      "tool.poetry.group.dev.dependencies"
-    ]) {
-      for (const name of Object.keys(results[dependencyType] || {})) {
-        delete results[dependencyType][name].age;
+    for (const mode of Object.keys(results || {})) {
+      for (const dependencyType of [
+        ...dependencyTypes,
+        "tool.poetry.dependencies",
+        "tool.poetry.dev-dependencies",
+        "tool.poetry.test-dependencies",
+        "tool.poetry.group.dev.dependencies",
+        "tool.poetry.group.test.dependencies",
+      ]) {
+        for (const name of Object.keys(results?.[mode]?.[dependencyType] || {})) {
+          delete results[mode][dependencyType][name].age;
+        }
       }
     }