diff --git a/modules/system/glitchtip/glitchtip.nix b/modules/system/glitchtip/glitchtip.nix
index 1635c7f..5e2f289 100644
--- a/modules/system/glitchtip/glitchtip.nix
+++ b/modules/system/glitchtip/glitchtip.nix
@@ -119,7 +119,7 @@ in
       };
 
       environment = lib.mkOption {
-        type = lib.types.listOf lib.types.string;
+        type = lib.types.listOf lib.types.str;
 	default = [ ];
 	example = [ "TMPDIR=/tmp/glitchtip" ];
 	description = ''