diff --git a/config.xml b/config.xml
index e852dd1be74c715d7e2374af79345694ddd4d50d..257742fd04ff87896028e99d3a6d97426bec4ee8 100644
--- a/config.xml
+++ b/config.xml
@@ -208,36 +208,11 @@
     <permission>org.jenkins.plugins.lockableresources.LockableResourcesManager.Unlock:scott</permission>
     <permission>org.jenkins.plugins.lockableresources.LockableResourcesManager.View:20180082</permission>
   </authorizationStrategy>
-  <securityRealm class="hudson.security.LDAPSecurityRealm" plugin="ldap@1.21">
-    <disableMailAddressResolver>false</disableMailAddressResolver>
-    <configurations>
-      <jenkins.security.plugins.ldap.LDAPConfiguration>
-        <server>10.57.117.135</server>
-        <rootDN>dc=ylhealth,dc=org</rootDN>
-        <inhibitInferRootDN>false</inhibitInferRootDN>
-        <userSearchBase>ou=People</userSearchBase>
-        <userSearch>cn={0}</userSearch>
-        <groupSearchBase>ou=Group</groupSearchBase>
-        <groupSearchFilter>cn={0}</groupSearchFilter>
-        <groupMembershipStrategy class="jenkins.security.plugins.ldap.FromGroupSearchLDAPGroupMembershipStrategy">
-          <filter>(memberUid={1})</filter>
-        </groupMembershipStrategy>
-        <managerDN>cn=Manager,dc=ylhealth,dc=org</managerDN>
-        <managerPasswordSecret>{AQAAABAAAAAQqW4q94vLqYUkmrfHsrmUYa+TG0hUeTepU8Q45EuEVAA=}</managerPasswordSecret>
-        <displayNameAttributeName>displayname</displayNameAttributeName>
-        <mailAddressAttributeName>mail</mailAddressAttributeName>
-        <ignoreIfUnavailable>false</ignoreIfUnavailable>
-        <extraEnvVars class="linked-hash-map">
-          <entry>
-            <string></string>
-            <string></string>
-          </entry>
-        </extraEnvVars>
-      </jenkins.security.plugins.ldap.LDAPConfiguration>
-    </configurations>
-    <userIdStrategy class="jenkins.model.IdStrategy$CaseInsensitive"/>
-    <groupIdStrategy class="jenkins.model.IdStrategy$CaseInsensitive"/>
-    <disableRolePrefixing>true</disableRolePrefixing>
+  <securityRealm class="org.jenkinsci.plugins.GitLabSecurityRealm">
+    <gitlabWebUri>https://cm.ylhealth.org/gitlab/</gitlabWebUri>
+    <gitlabApiUri>https://cm.ylhealth.org/gitlab/</gitlabApiUri>
+    <clientID>1c401a121b99936cfcb529c4be69bc72006b1affca5e9b3d62dabb3f4a7eefa4</clientID>
+    <clientSecret>af52a540279ced56081907914129900aa26c6640baad0a83871b885a921ee9e8</clientSecret>
   </securityRealm>
   <disableRememberMe>false</disableRememberMe>
   <projectNamingStrategy class="jenkins.model.ProjectNamingStrategy$DefaultProjectNamingStrategy"/>