diff --git a/authfilters/src/main/java/cz/incad/kramerius/auth/thirdparty/shibb/utils/ShibbolethUtils.java b/authfilters/src/main/java/cz/incad/kramerius/auth/thirdparty/shibb/utils/ShibbolethUtils.java
index 7a646463fd..98e16303b3 100644
--- a/authfilters/src/main/java/cz/incad/kramerius/auth/thirdparty/shibb/utils/ShibbolethUtils.java
+++ b/authfilters/src/main/java/cz/incad/kramerius/auth/thirdparty/shibb/utils/ShibbolethUtils.java
@@ -42,7 +42,7 @@ public static boolean isUnderShibbolethSession(HttpServletRequest httpServletReq
         Enumeration headerNames = httpServletRequest.getHeaderNames();
         while(headerNames.hasMoreElements()) {
             String hname = (String) headerNames.nextElement();
-            if (hname.contains(SHIB_PROVIDER_KEY)) {
+            if (hname.toLowerCase().contains(SHIB_PROVIDER_KEY.toLowerCase())) {
                 String headerValue = httpServletRequest.getHeader(hname);
                 if ((headerValue != null) && (!headerValue.trim().equals(""))) {
                     foundIdentityProvider = true;
@@ -69,7 +69,7 @@ public static String getShibbolethSessionId(HttpServletRequest httpServletReques
         Enumeration headerNames = httpServletRequest.getHeaderNames();
         while(headerNames.hasMoreElements()) {
             String hname = (String) headerNames.nextElement();
-            if (hname.contains(SHIB_SESSION_KEY)) {
+            if (hname.toLowerCase().contains(SHIB_SESSION_KEY.toLowerCase())) {
                 String headerValue = httpServletRequest.getHeader(hname);
                 if ((headerValue != null) && (!headerValue.trim().equals(""))) {
                     return headerValue;