diff --git a/pmd-ui/pom.xml b/pmd-ui/pom.xml
index 77843bb713..89b7862a28 100644
--- a/pmd-ui/pom.xml
+++ b/pmd-ui/pom.xml
@@ -70,11 +70,6 @@
             <groupId>net.sourceforge.pmd</groupId>
             <artifactId>pmd-core</artifactId>
         </dependency>
-        <dependency>
-            <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-java</artifactId>
-            <version>${project.version}</version>
-        </dependency>
 
         <!-- OpenJFX dependencies are provided. OpenJFX needs to be installed separately. -->
         <dependency>
@@ -147,36 +142,49 @@
             <groupId>net.sourceforge.pmd</groupId>
             <artifactId>pmd-apex</artifactId>
             <version>${project.version}</version>
+            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-jsp</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-plsql</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-visualforce</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-xml</artifactId>
-            <version>${project.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>net.sourceforge.pmd</groupId>
-            <artifactId>pmd-vm</artifactId>
+            <artifactId>pmd-java</artifactId>
             <version>${project.version}</version>
+            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>net.sourceforge.pmd</groupId>
             <artifactId>pmd-javascript</artifactId>
             <version>${project.version}</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-jsp</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-plsql</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-visualforce</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-vm</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-xml</artifactId>
+            <version>${project.version}</version>
+            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>junit</groupId>