diff --git a/packages/stargate/src/modules/authz/aminomessages.ts b/packages/stargate/src/modules/authz/aminomessages.ts
index f5d706a8..b4857884 100644
--- a/packages/stargate/src/modules/authz/aminomessages.ts
+++ b/packages/stargate/src/modules/authz/aminomessages.ts
@@ -2,8 +2,12 @@ import { AminoConverters } from "../../aminotypes";
 
 export function createAuthzAminoConverters(): AminoConverters {
   return {
-    "/cosmos.authz.v1beta1.MsgGrant": "not_supported_by_chain",
-    "/cosmos.authz.v1beta1.MsgExec": "not_supported_by_chain",
-    "/cosmos.authz.v1beta1.MsgRevoke": "not_supported_by_chain",
+    // For Cosmos SDK < 0.46 the Amino JSON codec was broken on chain and thus inaccessible.
+    // Now this can be implemented for 0.46+ chains, see
+    // https://github.com/cosmos/cosmjs/issues/1092
+    //
+    // "/cosmos.authz.v1beta1.MsgGrant": IMPLEMENT ME,
+    // "/cosmos.authz.v1beta1.MsgExec": IMPLEMENT ME,
+    // "/cosmos.authz.v1beta1.MsgRevoke": IMPLEMENT ME,
   };
 }
diff --git a/packages/stargate/src/modules/feegrant/aminomessages.ts b/packages/stargate/src/modules/feegrant/aminomessages.ts
index 5b61109e..c36bc9a9 100644
--- a/packages/stargate/src/modules/feegrant/aminomessages.ts
+++ b/packages/stargate/src/modules/feegrant/aminomessages.ts
@@ -2,7 +2,11 @@ import { AminoConverters } from "../../aminotypes";
 
 export function createFeegrantAminoConverters(): AminoConverters {
   return {
-    "/cosmos.feegrant.v1beta1.MsgGrantAllowance": "not_supported_by_chain",
-    "/cosmos.feegrant.v1beta1.MsgRevokeAllowance": "not_supported_by_chain",
+    // For Cosmos SDK < 0.46 the Amino JSON codec was broken on chain and thus inaccessible.
+    // Now this can be implemented for 0.46+ chains, see
+    // https://github.com/cosmos/cosmjs/issues/1092
+    //
+    // "/cosmos.feegrant.v1beta1.MsgGrantAllowance": IMPLEMENT_ME,
+    // "/cosmos.feegrant.v1beta1.MsgRevokeAllowance": IMPLEMENT_ME,
   };
 }