diff --git a/extism.opam b/extism.opam
index 1802692..57f667f 100644
--- a/extism.opam
+++ b/extism.opam
@@ -14,6 +14,7 @@ depends: [
   "dune" {>= "3.2"}
   "ctypes" {>= "0.22.0"}
   "ctypes-foreign" {>= "0.22.0"}
+  "integers" {>= "0.3.0"}
   "bigstringaf" {>= "0.9.0"}
   "ppx_yojson_conv" {>= "v0.15.0"}
   "extism-manifest" {= version}