diff --git a/pkgs/servers/http/tomcat/default.nix b/pkgs/servers/http/tomcat/default.nix
index 7d972ba3486e..edf1e59931ed 100644
--- a/pkgs/servers/http/tomcat/default.nix
+++ b/pkgs/servers/http/tomcat/default.nix
@@ -57,8 +57,8 @@ in {
 
   tomcatUnstable = common {
     versionMajor = "9";
-    versionMinor = "0.0.M10";
-    sha256 = "0p3pqwz9zjvr9w73divsyaa53mbazf0icxfs06wvgxsvkbgj5gq9";
+    versionMinor = "0.0.M13";
+    sha256 = "0im3w4iqpar7x50vg7c9zkxyqf9x53xs5jvcq79xqgrmcqb9lk91";
   };
 
 }