diff --git a/modules/services/web-servers/apache-httpd/default.nix b/modules/services/web-servers/apache-httpd/default.nix
index a7e0472cd3f..4894276e1d3 100644
--- a/modules/services/web-servers/apache-httpd/default.nix
+++ b/modules/services/web-servers/apache-httpd/default.nix
@@ -143,9 +143,9 @@ let
 
 
   sslConf = ''
-    SSLSessionCache dbm:${mainCfg.stateDir}/ssl_scache
+    SSLSessionCache shm:${mainCfg.stateDir}/ssl_scache(512000)
 
-    SSLMutex file:${mainCfg.stateDir}/ssl_mutex
+    SSLMutex posixsem
 
     SSLRandomSeed startup builtin
     SSLRandomSeed connect builtin