diff --git a/flake.lock b/flake.lock
index 6ebaeb2..4c1078e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -919,16 +919,16 @@
     "ibc-go-v9-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1723037346,
-        "narHash": "sha256-ba8gbJ0l4l8ZRT9XVN3hTcnxZSb5Fn20p1xiEG4/54c=",
+        "lastModified": 1725262239,
+        "narHash": "sha256-F2p/lIs2/ropKdm0Pebz1kjhRlgwYK0BmDGe/sYec3Y=",
         "owner": "cosmos",
         "repo": "ibc-go",
-        "rev": "66ebf864d7bfe2193a96c972a9e74196b2ddf104",
+        "rev": "8983f91e519fb1c43d9c9481ba60f11e4ae2b2b0",
         "type": "github"
       },
       "original": {
         "owner": "cosmos",
-        "ref": "v9.0.0-beta.1",
+        "ref": "v9.0.0-rc.0",
         "repo": "ibc-go",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index cdf5526..6885605 100644
--- a/flake.nix
+++ b/flake.nix
@@ -147,7 +147,7 @@
     ibc-go-v8-src.url = "github:cosmos/ibc-go/v8.5.1";
     ibc-go-v8-src.flake = false;
 
-    ibc-go-v9-src.url = "github:cosmos/ibc-go/v9.0.0-beta.1";
+    ibc-go-v9-src.url = "github:cosmos/ibc-go/v9.0.0-rc.0";
     ibc-go-v9-src.flake = false;
 
     ibc-go-v7-wasm-src = {
diff --git a/packages/ibc-go.nix b/packages/ibc-go.nix
index b96e893..92dbebe 100644
--- a/packages/ibc-go.nix
+++ b/packages/ibc-go.nix
@@ -90,18 +90,14 @@ with inputs;
 
     ibc-go-v9-simapp = {
       name = "simd";
-      version = "v9.0.0-beta.1-wasm";
+      version = "v9.0.0-rc.0";
       src = ibc-go-v9-src;
-      sourceRoot = "source/modules/light-clients/08-wasm";
       rev = ibc-go-v9-src.rev;
-      vendorHash = "sha256-uAHvGRXhjydh+c5/M71qRDOYGiHT1ZryvyAgjgHSSo0=";
+      sourceRoot = "source/simapp";
+      vendorHash = "sha256-tcGoHs2tPcSBgTfyJCF6cvOpLEjDGG38QFxT59JtwI8=";
       goVersion = "1.22";
       tags = ["netgo"];
       engine = "cometbft/cometbft";
-      preFixup = ''
-        ${wasmdPreFixupPhase libwasmvm_2_1_0 "simd"}
-      '';
-      buildInputs = [libwasmvm_2_1_0];
     };
 
     ibc-go-v7-wasm-simapp = {