diff --git a/pkgs/development/libraries/hunspell/dictionaries.nix b/pkgs/development/libraries/hunspell/dictionaries.nix
index 17c73c118cec..1f1f5a687a4b 100644
--- a/pkgs/development/libraries/hunspell/dictionaries.nix
+++ b/pkgs/development/libraries/hunspell/dictionaries.nix
@@ -828,14 +828,14 @@ rec {
   th_TH = th-th;
   th-th = mkDict {
     pname = "hunspell-dict-th-th";
-    version = "experimental-2021-12-20";
+    version = "experimental-2023-03-01";
     dictFileName = "th_TH";
     readmeFile = "README.md";
     src = fetchFromGitHub {
       owner = "SyafiqHadzir";
       repo = "Hunspell-TH";
-      rev = "f119e58e5f6954965d6abd683e7d4c4b9be2684f";
-      sha256 = "sha256-hwqKvuLxbtzxfyQ5YhC/sdb3QQwxCfzgDOHeatxDjxM=";
+      rev = "9c09f1b7c0eb4d04b9f6f427901686c5c3d9fa54";
+      sha256 = "1wszpnbgj31k72x1vvcfkzcpmxsncdpqsi3zagah7swilpi7cqm4";
     };
     meta = with lib; {
       description = "Hunspell dictionary for Central Thai (Thailand)";