diff --git a/pom.xml b/pom.xml
index 1868323eb..cadaa5031 100644
--- a/pom.xml
+++ b/pom.xml
@@ -431,15 +431,13 @@
       <artifactId>tomcat-embed-jasper</artifactId>
     </dependency>
     <dependency>
-    <groupId>jakarta.servlet.jsp.jstl</groupId>
-    <artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
-    <version>2.0.0</version>
-</dependency>
-<dependency>
-    <groupId>org.glassfish.web</groupId>
-    <artifactId>jakarta.servlet.jsp.jstl</artifactId>
-    <version>2.0.0</version>
-</dependency>
+      <groupId>jakarta.servlet.jsp.jstl</groupId>
+      <artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish.web</groupId>
+      <artifactId>jakarta.servlet.jsp.jstl</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.springframework.security</groupId>
       <artifactId>spring-security-taglibs</artifactId>
@@ -457,17 +455,12 @@
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpclient</artifactId>
-      <version>4.5.9</version>
+      <version>4.5.14</version>
     </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-lang3</artifactId>
-      <version>3.9</version>
-    </dependency>
-    <dependency>
-      <groupId>com.google.code.maven-play-plugin.net.tanesha.recaptcha4j</groupId>
-      <artifactId>recaptcha4j</artifactId>
-      <version>0.0.8</version>
+      <version>3.20.0</version>
     </dependency>
     <dependency>
       <groupId>org.apache.poi</groupId>
@@ -484,11 +477,6 @@
       <artifactId>poi-ooxml-schemas</artifactId>
       <version>3.7</version>
     </dependency>
-    <dependency>
-      <groupId>com.opencsv</groupId>
-      <artifactId>opencsv</artifactId>
-      <version>4.6</version>
-    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
@@ -502,19 +490,18 @@
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>testcontainers</artifactId>
-      <version>2.0.3</version>
+      <version>2.0.5</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.testcontainers</groupId>
       <artifactId>junit-jupiter</artifactId>
-      <version>1.21.4</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.easymock</groupId>
       <artifactId>easymock</artifactId>
-      <version>5.5.0</version>
+      <version>5.7.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -575,7 +562,7 @@
     <dependency>
       <groupId>software.amazon.awssdk</groupId>
       <artifactId>translate</artifactId>
-      <version>2.40.15</version>
+      <version>2.43.2</version>
     </dependency>
     <dependency>
       <groupId>org.flywaydb</groupId>
diff --git a/src/main/java/org/wise/portal/service/peergrouping/logic/impl/DifferentIdeasLogicServiceImpl.java b/src/main/java/org/wise/portal/service/peergrouping/logic/impl/DifferentIdeasLogicServiceImpl.java
index 5caa19972..eb58fd136 100644
--- a/src/main/java/org/wise/portal/service/peergrouping/logic/impl/DifferentIdeasLogicServiceImpl.java
+++ b/src/main/java/org/wise/portal/service/peergrouping/logic/impl/DifferentIdeasLogicServiceImpl.java
@@ -5,7 +5,6 @@
 import java.util.Set;
 import java.util.TreeSet;
 
-import org.apache.commons.collections4.SetUtils;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -62,10 +61,25 @@ private TreeSet<WorkgroupLogicComparable> getWorkgroupsWithDifferentIdeas(
     for (Workgroup possibleMember : possibleMembers) {
       if (workgroupToAnnotation.containsKey(possibleMember)) {
         Set<String> possibleMemberIdeas = getDetectedIdeas(possibleMember, workgroupToAnnotation);
-        Set<String> differentIdeas = SetUtils.disjunction(workgroupIdeas, possibleMemberIdeas);
+        Set<String> differentIdeas = getDisjunction(workgroupIdeas, possibleMemberIdeas);
         workgroups.add(new WorkgroupWithDifference(possibleMember, differentIdeas.size(), logic));
       }
     }
     return workgroups;
   }
+
+  private Set<String> getDisjunction(Set<String> a, Set<String> b) {
+    Set<String> disjunction = new HashSet<String>();
+    for (String s : a) {
+      if (!b.contains(s)) {
+        disjunction.add(s);
+      }
+    }
+    for (String s : b) {
+      if (!a.contains(s)) {
+        disjunction.add(s);
+      }
+    }
+    return disjunction;
+  }
 }