diff --git a/dune-project b/dune-project
index 82fa7de7..0d664aa8 100644
--- a/dune-project
+++ b/dune-project
@@ -40,7 +40,7 @@
   z3)
  (conflicts
   (bitwuzla-cxx
-   (< "0.4.0"))
+   (< "0.6.0"))
   (z3
    (or
     (< "4.12.2")
diff --git a/smtml.opam b/smtml.opam
index 4c4f9d7b..de0eb7b0 100644
--- a/smtml.opam
+++ b/smtml.opam
@@ -46,7 +46,7 @@ depends: [
 ]
 depopts: ["alt-ergo-lib" "bitwuzla-cxx" "colibri2" "cvc5" "z3"]
 conflicts: [
-  "bitwuzla-cxx" {< "0.4.0"}
+  "bitwuzla-cxx" {< "0.6.0"}
   "z3" {< "4.12.2" | >= "4.14"}
 ]
 build: [
diff --git a/src/bitwuzla_mappings.default.ml b/src/bitwuzla_mappings.default.ml
index 712b8a0f..e36bb975 100644
--- a/src/bitwuzla_mappings.default.ml
+++ b/src/bitwuzla_mappings.default.ml
@@ -4,15 +4,6 @@
 
 include Mappings_intf
 
-(* Hack: this was a hack to try and run bitwuzla in Owi *)
-let leak =
-  let leaky_list = ref [] in
-  let mutex = Mutex.create () in
-  fun module_ ->
-    Mutex.lock mutex;
-    leaky_list := module_ :: !leaky_list;
-    Mutex.unlock mutex
-
 module Fresh_bitwuzla (B : Bitwuzla_cxx.S) : M = struct
   open B
 
@@ -511,13 +502,7 @@ end
 
 include (
   Mappings.Make (struct
-    module Make () = struct
-      let bitwuzla = (module Bitwuzla_cxx.Make () : Bitwuzla_cxx.S)
-
-      let () = leak bitwuzla
-
-      include Fresh_bitwuzla ((val bitwuzla))
-    end
+    module Make () = Fresh_bitwuzla (Bitwuzla_cxx.Make ())
 
     let is_available = true