diff --git a/flow-server/pom.xml b/flow-server/pom.xml
index e21626f8400..e670ac88a8d 100644
--- a/flow-server/pom.xml
+++ b/flow-server/pom.xml
@@ -130,25 +130,7 @@
         <dependency>
             <groupId>com.helger</groupId>
             <artifactId>ph-css</artifactId>
-            <version>6.1.1</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>com.helger</groupId>
-                    <artifactId>ph-commons</artifactId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-
-        <dependency>
-            <groupId>com.helger</groupId>
-            <artifactId>ph-commons</artifactId>
-            <version>9.1.2</version>
-            <exclusions>
-                <exclusion>
-                    <groupId>com.google.code.findbugs</groupId>
-                    <artifactId>jsr305</artifactId>
-                </exclusion>
-            </exclusions>
+            <version>6.3.4</version>
         </dependency>
 
         <!-- Byte code generation -->