diff --git a/authentication-module/pom.xml b/authentication-module/pom.xml
index dd588562c74960256ded28a61addb3ff6782398a..97db28fb2b14d568a794cb608823dbdb8f07bfcf 100644
--- a/authentication-module/pom.xml
+++ b/authentication-module/pom.xml
@@ -34,6 +34,11 @@
             <artifactId>nimbus-jose-jwt</artifactId>
             <version>${nimbus.jwt.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.ow2.asm</groupId>
+            <artifactId>asm</artifactId>
+            <version>${asm.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/jams-server/pom.xml b/jams-server/pom.xml
index 5a9964471d0569db03b38be85319dc760d381eca..16d4bc93a882176e56580aec0eaf03f8167df009 100644
--- a/jams-server/pom.xml
+++ b/jams-server/pom.xml
@@ -61,6 +61,11 @@
             <artifactId>nimbus-jose-jwt</artifactId>
             <version>${nimbus.jwt.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.ow2.asm</groupId>
+            <artifactId>asm</artifactId>
+            <version>${asm.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/jams-server/src/main/java/net/jami/jams/server/servlets/filters/InstallFilter.java b/jams-server/src/main/java/net/jami/jams/server/servlets/filters/InstallFilter.java
index 696cec90a72cfd6510ce73d3bd3d3eb51a490f8b..e653da22132a55b46b7638764d39e10330cf5a1f 100644
--- a/jams-server/src/main/java/net/jami/jams/server/servlets/filters/InstallFilter.java
+++ b/jams-server/src/main/java/net/jami/jams/server/servlets/filters/InstallFilter.java
@@ -31,16 +31,18 @@ public class InstallFilter implements Filter {
             boolean isLogin = false;
             if(request.getServletPath().contains("start")) isLogin = true;
             SignedJWT signedJWT = null;
-            try {
-                JWSVerifier jwsVerifier = new RSASSAVerifier(userAuthenticationModule.getAuthModulePubKey());
-                signedJWT = SignedJWT.parse(request.getHeader("Bearer"));
-                if(signedJWT.verify(jwsVerifier) && signedJWT.getJWTClaimsSet().getExpirationTime().compareTo(new Date()) > 0){
-                    authsuccess = true;
-                    request.setAttribute("username",signedJWT.getJWTClaimsSet().getSubject());
-                    request.setAttribute("accessLevel",signedJWT.getJWTClaimsSet().getClaim("scope"));
+            if(request.getHeader("Bearer") != null) {
+                try {
+                    JWSVerifier jwsVerifier = new RSASSAVerifier(userAuthenticationModule.getAuthModulePubKey());
+                    signedJWT = SignedJWT.parse(request.getHeader("Bearer"));
+                    if (signedJWT.verify(jwsVerifier) && signedJWT.getJWTClaimsSet().getExpirationTime().compareTo(new Date()) > 0) {
+                        authsuccess = true;
+                        request.setAttribute("username", signedJWT.getJWTClaimsSet().getSubject());
+                        request.setAttribute("accessLevel", signedJWT.getJWTClaimsSet().getClaim("scope"));
+                    }
+                } catch (Exception e) {
+                    log.info("Received an invalid token, declining access...");
                 }
-            } catch (Exception e) {
-                log.info("Received an invalid token, declining access...");
             }
             if(authsuccess || isLogin) filterChain.doFilter(servletRequest,servletResponse);
             else response.sendError(403,"You are not authorized to access this page!");
diff --git a/pom.xml b/pom.xml
index bd0f1c4265f1b4ff8ba0a7c8bc9c2cbe459bd6b1..1da1ddf2517e99911f33af62e080eda9e27a47f3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,6 +45,7 @@
         <javax.servlet.version>4.0.1</javax.servlet.version>
         <maven.clean.version>3.1.0</maven.clean.version>
         <nimbus.jwt.version>8.17</nimbus.jwt.version>
+        <asm.version>8.0</asm.version>
     </properties>
 
     <dependencies>