diff --git a/packages/stargate/package.json b/packages/stargate/package.json
index 63140b0a63..2323ffe94c 100644
--- a/packages/stargate/package.json
+++ b/packages/stargate/package.json
@@ -45,7 +45,7 @@
     "postdefine-proto": "prettier --write \"src/codec/generated/codecimpl.*\""
   },
   "dependencies": {
-    "@confio/ics23": "^0.6.0",
+    "@confio/ics23": "^0.6.3",
     "@cosmjs/encoding": "^0.22.1",
     "@cosmjs/launchpad": "^0.22.1",
     "@cosmjs/math": "^0.22.1",
diff --git a/packages/stargate/src/queries/queryclient.ts b/packages/stargate/src/queries/queryclient.ts
index 7b0085e69e..8ccee14a3e 100644
--- a/packages/stargate/src/queries/queryclient.ts
+++ b/packages/stargate/src/queries/queryclient.ts
@@ -1,45 +1,10 @@
 /* eslint-disable no-dupe-class-members, @typescript-eslint/ban-types, @typescript-eslint/naming-convention */
-import { ics23, verifyExistence, verifyNonExistence } from "@confio/ics23";
+import { iavlSpec, ics23, tendermintSpec, verifyExistence, verifyNonExistence } from "@confio/ics23";
 import { fromAscii, toAscii, toHex } from "@cosmjs/encoding";
 import { firstEvent } from "@cosmjs/stream";
 import { Client as TendermintClient } from "@cosmjs/tendermint-rpc";
 import { arrayContentEquals, assert, isNonNullObject } from "@cosmjs/utils";
 
-// TODO: import these from @confio/ics23 when exported
-export const IavlSpec: ics23.IProofSpec = {
-  leafSpec: {
-    prefix: Uint8Array.from([0]),
-    hash: ics23.HashOp.SHA256,
-    prehashValue: ics23.HashOp.SHA256,
-    prehashKey: ics23.HashOp.NO_HASH,
-    length: ics23.LengthOp.VAR_PROTO,
-  },
-  innerSpec: {
-    childOrder: [0, 1],
-    minPrefixLength: 4,
-    maxPrefixLength: 12,
-    childSize: 33,
-    hash: ics23.HashOp.SHA256,
-  },
-};
-
-export const TendermintSpec: ics23.IProofSpec = {
-  leafSpec: {
-    prefix: Uint8Array.from([0]),
-    hash: ics23.HashOp.SHA256,
-    prehashValue: ics23.HashOp.SHA256,
-    prehashKey: ics23.HashOp.NO_HASH,
-    length: ics23.LengthOp.VAR_PROTO,
-  },
-  innerSpec: {
-    childOrder: [0, 1],
-    minPrefixLength: 1,
-    maxPrefixLength: 1,
-    childSize: 32,
-    hash: ics23.HashOp.SHA256,
-  },
-};
-
 type QueryExtensionSetup<P> = (base: QueryClient) => P;
 
 export class QueryClient {
@@ -233,13 +198,13 @@ export class QueryClient {
       // non-existence check
       assert(subProof.nonexist);
       // the subproof must map the desired key to the "value" of the storeProof
-      verifyNonExistence(subProof.nonexist, IavlSpec, storeProof.exist.value, key);
+      verifyNonExistence(subProof.nonexist, iavlSpec, storeProof.exist.value, key);
     } else {
       // existence check
       assert(subProof.exist);
       assert(subProof.exist.value);
       // the subproof must map the desired key to the "value" of the storeProof
-      verifyExistence(subProof.exist, IavlSpec, storeProof.exist.value, key, response.value);
+      verifyExistence(subProof.exist, iavlSpec, storeProof.exist.value, key, response.value);
     }
 
     // the storeproof must map it's declared value (root of subProof) to the appHash of the next block
@@ -253,7 +218,7 @@ export class QueryClient {
       throw new Error(`Query returned height ${response.height}, but next header was ${header.height}`);
     }
 
-    verifyExistence(storeProof.exist, TendermintSpec, header.appHash, toAscii(store), storeProof.exist.value);
+    verifyExistence(storeProof.exist, tendermintSpec, header.appHash, toAscii(store), storeProof.exist.value);
 
     return response.value;
   }
diff --git a/packages/stargate/types/queries/queryclient.d.ts b/packages/stargate/types/queries/queryclient.d.ts
index a40d73a2f9..c00db57b45 100644
--- a/packages/stargate/types/queries/queryclient.d.ts
+++ b/packages/stargate/types/queries/queryclient.d.ts
@@ -1,7 +1,4 @@
-import { ics23 } from "@confio/ics23";
 import { Client as TendermintClient } from "@cosmjs/tendermint-rpc";
-export declare const IavlSpec: ics23.IProofSpec;
-export declare const TendermintSpec: ics23.IProofSpec;
 declare type QueryExtensionSetup<P> = (base: QueryClient) => P;
 export declare class QueryClient {
   /** Constructs a QueryClient with 0 extensions */
diff --git a/yarn.lock b/yarn.lock
index 3e8bf20403..2811a512a5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -177,22 +177,15 @@
     lodash "^4.17.13"
     to-fast-properties "^2.0.0"
 
-"@confio/ics23@^0.6.0":
-  version "0.6.0"
-  resolved "https://registry.yarnpkg.com/@confio/ics23/-/ics23-0.6.0.tgz#8c3e6508159bdbee02b12beeee9b369ea68ef6ba"
-  integrity sha512-P/NcAO3pz7xXg4cpwaKRUIN4PuOOxwY94n7WD+wod7UG5YlMLzb8Upv6nZo9/brnKXW4gXB2DccLTtV0Um1Wvw==
+"@confio/ics23@^0.6.3":
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/@confio/ics23/-/ics23-0.6.3.tgz#d27da1efca21253dee1b7d038913d72a99a17ca1"
+  integrity sha512-SQDH9tTzXIbC1AVTrjL7BEXfsYwERXNOB7F995LhfJDrP44cC5sl3Prh+lkfKOjn1jkgxknVUyaGx3tMG88gjQ==
   dependencies:
     protobufjs "^6.8.8"
     ripemd160 "^2.0.2"
     sha.js "^2.4.11"
 
-"@cosmjs/stream@^0.22.2":
-  version "0.22.2"
-  resolved "https://registry.yarnpkg.com/@cosmjs/stream/-/stream-0.22.2.tgz#060c00374d06586a23b53f1f3a7f0bd4aa98557d"
-  integrity sha512-X3EG8HNn3nW+2iXjff6r8a77crermJ/aSijLxzw1in9+hipF6hG4UmSxN14knSPF6lfqSp80oFoKR6GT1/2r5w==
-  dependencies:
-    xstream "^11.10.0"
-
 "@evocateur/libnpmaccess@^3.1.2":
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/@evocateur/libnpmaccess/-/libnpmaccess-3.1.2.tgz#ecf7f6ce6b004e9f942b098d92200be4a4b1c845"