diff --git a/opam b/opam
index 0cc5343ff..47c339ae8 100644
--- a/opam
+++ b/opam
@@ -35,10 +35,10 @@ depends: [
   "ocamlfind" { build }
   "coq" {>= "8.20.0" & < "9.1~"}
   "coq-elpi" {>= "2.5.1"}
-  "coq-mathcomp-ssreflect" {>= "2.0" & < "2.5~"}
+  "coq-mathcomp-ssreflect" {>= "2.0" & < "2.6~"}
   "coq-mathcomp-algebra"
   "coq-mathcomp-algebra-tactics"
-  "coq-mathcomp-word" {>= "3.3"}
+  "coq-mathcomp-word" {>= "3.4"}
   "coq-paco"
   "coq-itree"
 ]
diff --git a/scripts/mathcomp-word.nix b/scripts/mathcomp-word.nix
index 04ad5a68e..01d866740 100644
--- a/scripts/mathcomp-word.nix
+++ b/scripts/mathcomp-word.nix
@@ -2,17 +2,17 @@
 
 let inherit (coqPackages) coq; in
 
-let rev = "8a677724135da3ef369f154b060c7fd97239ff15"; in
+let rev = "cc1b73985d5d6a575d79fb70584171a5b2f08fb3"; in
 
 stdenv.mkDerivation rec {
-  version = "3.3-git-${builtins.substring 0 8 rev}";
+  version = "3.4-git-${builtins.substring 0 8 rev}";
   pname = "coq${coq.coq-version}-mathcomp-word";
 
   src = fetchFromGitHub {
     owner = "jasmin-lang";
     repo = "coqword";
     inherit rev;
-    hash = "sha256-5ZKz2QKOfMRCfppR/3oKzIghEU1pMUB0128OdSP6ptw=";
+    hash = "sha256-yRB7hcttDJCQ8Y2Xbj2iuQSSAlL0MdyAJibJWU+hnrA=";
   };
 
   buildInputs = [ coq ocaml dune_3 ];