diff --git a/CHANGELOG.md b/CHANGELOG.md
index d82201ed2e..465110ae9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,11 +22,15 @@ and this project adheres to
   `createStakingAminoConverters`. This made `prefix` in
   `SigningCosmWasmClientOptions` and `SigningStargateClientOptions` obsolete, so
   this was also deleted. ([#1291])
+- @cosmjs/proto-signing: Remove `fromJSON`/`toJSON` from `TsProtoGeneratedType`
+  such that generated types are not required to generate those anymore. The
+  methods were provided by ts-proto but we never needed them. ([#1329])
 
 [#1002]: https://github.com/cosmos/cosmjs/issues/1002
 [#1240]: https://github.com/cosmos/cosmjs/pull/1240
 [#1289]: https://github.com/cosmos/cosmjs/issues/1289
 [#1291]: https://github.com/cosmos/cosmjs/issues/1291
+[#1329]: https://github.com/cosmos/cosmjs/pull/1329
 [#1341]: https://github.com/cosmos/cosmjs/issues/1341
 
 ## [0.29.5] - 2022-12-07
diff --git a/packages/cosmwasm-stargate/src/signingcosmwasmclient.spec.ts b/packages/cosmwasm-stargate/src/signingcosmwasmclient.spec.ts
index 3a81e6a334..fac9198078 100644
--- a/packages/cosmwasm-stargate/src/signingcosmwasmclient.spec.ts
+++ b/packages/cosmwasm-stargate/src/signingcosmwasmclient.spec.ts
@@ -879,10 +879,6 @@ describe("SigningCosmWasmClient", () => {
             throw new Error("decode method should not be required");
           },
 
-          fromJSON(): CustomMsgDelegate {
-            throw new Error("fromJSON method should not be required");
-          },
-
           fromPartial(object: DeepPartial<CustomMsgDelegate>): CustomMsgDelegate {
             const message = { ...baseCustomMsgDelegate } as CustomMsgDelegate;
             if (object.customDelegatorAddress !== undefined && object.customDelegatorAddress !== null) {
@@ -902,10 +898,6 @@ describe("SigningCosmWasmClient", () => {
             }
             return message;
           },
-
-          toJSON(): unknown {
-            throw new Error("toJSON method should not be required");
-          },
         };
         customRegistry.register(msgDelegateTypeUrl, CustomMsgDelegate);
         const customAminoTypes = new AminoTypes({
@@ -1178,10 +1170,6 @@ describe("SigningCosmWasmClient", () => {
             throw new Error("decode method should not be required");
           },
 
-          fromJSON(): CustomMsgDelegate {
-            throw new Error("fromJSON method should not be required");
-          },
-
           fromPartial(object: DeepPartial<CustomMsgDelegate>): CustomMsgDelegate {
             const message = { ...baseCustomMsgDelegate } as CustomMsgDelegate;
             if (object.customDelegatorAddress !== undefined && object.customDelegatorAddress !== null) {
@@ -1201,10 +1189,6 @@ describe("SigningCosmWasmClient", () => {
             }
             return message;
           },
-
-          toJSON(): unknown {
-            throw new Error("toJSON method should not be required");
-          },
         };
         customRegistry.register(msgDelegateTypeUrl, CustomMsgDelegate);
         const customAminoTypes = new AminoTypes({
diff --git a/packages/proto-signing/src/registry.ts b/packages/proto-signing/src/registry.ts
index 5be89db54f..503f7abe7d 100644
--- a/packages/proto-signing/src/registry.ts
+++ b/packages/proto-signing/src/registry.ts
@@ -12,9 +12,10 @@ import type protobuf from "protobufjs";
 export interface TsProtoGeneratedType {
   readonly encode: (message: any | { [k: string]: any }, writer?: protobuf.Writer) => protobuf.Writer;
   readonly decode: (input: Uint8Array | protobuf.Reader, length?: number) => any;
-  readonly fromJSON: (object: any) => any;
   readonly fromPartial: (object: any) => any;
-  readonly toJSON: (message: any | { [k: string]: any }) => unknown;
+  // Methods from ts-proto types we don't need
+  // readonly fromJSON: (object: any) => any;
+  // readonly toJSON: (message: any | { [k: string]: any }) => unknown;
 }
 
 /**
diff --git a/packages/stargate/src/signingstargateclient.spec.ts b/packages/stargate/src/signingstargateclient.spec.ts
index b8e5f1df25..e0a58e2b8e 100644
--- a/packages/stargate/src/signingstargateclient.spec.ts
+++ b/packages/stargate/src/signingstargateclient.spec.ts
@@ -542,10 +542,6 @@ describe("SigningStargateClient", () => {
             throw new Error("decode method should not be required");
           },
 
-          fromJSON(): CustomMsgDelegate {
-            throw new Error("fromJSON method should not be required");
-          },
-
           fromPartial(object: DeepPartial<CustomMsgDelegate>): CustomMsgDelegate {
             const message = { ...baseCustomMsgDelegate } as CustomMsgDelegate;
             if (object.customDelegatorAddress !== undefined && object.customDelegatorAddress !== null) {
@@ -565,10 +561,6 @@ describe("SigningStargateClient", () => {
             }
             return message;
           },
-
-          toJSON(): unknown {
-            throw new Error("toJSON method should not be required");
-          },
         };
         customRegistry.register(msgDelegateTypeUrl, CustomMsgDelegate);
         const customAminoTypes = new AminoTypes({
@@ -830,10 +822,6 @@ describe("SigningStargateClient", () => {
             throw new Error("decode method should not be required");
           },
 
-          fromJSON(): CustomMsgDelegate {
-            throw new Error("fromJSON method should not be required");
-          },
-
           fromPartial(object: DeepPartial<CustomMsgDelegate>): CustomMsgDelegate {
             const message = { ...baseCustomMsgDelegate } as CustomMsgDelegate;
             if (object.customDelegatorAddress !== undefined && object.customDelegatorAddress !== null) {
@@ -853,10 +841,6 @@ describe("SigningStargateClient", () => {
             }
             return message;
           },
-
-          toJSON(): unknown {
-            throw new Error("toJSON method should not be required");
-          },
         };
         customRegistry.register(msgDelegateTypeUrl, CustomMsgDelegate);
         const customAminoTypes = new AminoTypes({