diff --git a/extensions/guacamole-auth-cas/pom.xml b/extensions/guacamole-auth-cas/pom.xml
index be07c6482..ae8bd6739 100644
--- a/extensions/guacamole-auth-cas/pom.xml
+++ b/extensions/guacamole-auth-cas/pom.xml
@@ -227,6 +227,12 @@
             <groupId>org.jasig.cas.client</groupId>
             <artifactId>cas-client-core</artifactId>
             <version>3.4.1</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <!-- Guice -->
@@ -249,7 +255,6 @@
             <scope>provided</scope>
         </dependency>
 
-
     </dependencies>
 
 </project>
diff --git a/extensions/guacamole-auth-radius/pom.xml b/extensions/guacamole-auth-radius/pom.xml
index 151875cf1..d07a60a87 100644
--- a/extensions/guacamole-auth-radius/pom.xml
+++ b/extensions/guacamole-auth-radius/pom.xml
@@ -215,6 +215,12 @@
             <groupId>net.jradius</groupId>
             <artifactId>jradius-core</artifactId>
             <version>1.1.5</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <!-- JRadius Dictionary, for accessing packet attributes -->