diff --git a/services/gitea.nix b/services/gitea.nix
index ee6a25e..3d6ccfe 100644
--- a/services/gitea.nix
+++ b/services/gitea.nix
@@ -19,7 +19,7 @@
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [ ((import sources.nix-hexchen) { }).profiles.nopersist ];
 
diff --git a/services/hedgedoc-hacc.nix b/services/hedgedoc-hacc.nix
index 4963f79..595b7b7 100644
--- a/services/hedgedoc-hacc.nix
+++ b/services/hedgedoc-hacc.nix
@@ -16,7 +16,7 @@
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist
diff --git a/services/hedgedoc-i4f.nix b/services/hedgedoc-i4f.nix
index 973d6d6..09831ac 100644
--- a/services/hedgedoc-i4f.nix
+++ b/services/hedgedoc-i4f.nix
@@ -16,7 +16,7 @@
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist
diff --git a/services/lantifa.nix b/services/lantifa.nix
index ee1f694..c52e5e4 100644
--- a/services/lantifa.nix
+++ b/services/lantifa.nix
@@ -18,7 +18,7 @@
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
       hexchen.bindmounts."/var/lib/mediawiki" = "/persist/var/lib/mediawiki";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist
diff --git a/services/mattermost.nix b/services/mattermost.nix
index 17ea5c5..2490aee 100644
--- a/services/mattermost.nix
+++ b/services/mattermost.nix
@@ -20,7 +20,7 @@ in {
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist
diff --git a/services/nextcloud.nix b/services/nextcloud.nix
index 1a76287..673009b 100644
--- a/services/nextcloud.nix
+++ b/services/nextcloud.nix
@@ -16,7 +16,7 @@
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist
diff --git a/services/thelounge.nix b/services/thelounge.nix
index b55c2c8..5593ce9 100644
--- a/services/thelounge.nix
+++ b/services/thelounge.nix
@@ -16,7 +16,7 @@ in
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       nixpkgs.config.allowUnfree = true;
       networking.firewall.enable = false;
diff --git a/services/uffd.nix b/services/uffd.nix
index 2ac31af..68f96e5 100644
--- a/services/uffd.nix
+++ b/services/uffd.nix
@@ -18,7 +18,7 @@ in {
       boot.isContainer = true;
       networking.useDHCP = false;
       users.users.root.hashedPassword = "";
-      system.stateVersion = "21.11";
+      system.stateVersion = "21.05";
 
       imports = [
         ((import sources.nix-hexchen) {}).profiles.nopersist