diff --git a/dune-project b/dune-project
index f900cdb..88a33ec 100644
--- a/dune-project
+++ b/dune-project
@@ -1,4 +1,4 @@
-(lang dune 3.12)
+(lang dune 3.11)
 
 (name flake_env)
 (generate_opam_files true)
diff --git a/dune-workspace b/dune-workspace
index a017b55..42130a0 100644
--- a/dune-workspace
+++ b/dune-workspace
@@ -1,2 +1,2 @@
-(lang dune 3.12)
+(lang dune 3.11)
 (instrument_with bisect_ppx)
\ No newline at end of file