diff --git a/multichain-testing/package.json b/multichain-testing/package.json
index 158a9a46829..9f84d3a8752 100644
--- a/multichain-testing/package.json
+++ b/multichain-testing/package.json
@@ -17,14 +17,14 @@
   },
   "packageManager": "yarn@4.1.1",
   "devDependencies": {
-    "@agoric/cosmic-proto": "0.4.1-dev-08f8549.0",
-    "@cosmjs/crypto": "^0.32.2",
-    "@cosmjs/proto-signing": "^0.32.2",
-    "@cosmjs/stargate": "^0.32.2",
-    "@endo/errors": "^1.2.2",
-    "@endo/far": "^1.1.2",
-    "@endo/nat": "^5.0.7",
-    "@endo/ses-ava": "^1.2.2",
+    "@agoric/cosmic-proto": "0.4.1-dev-5b3e4d0.0",
+    "@cosmjs/crypto": "^0.32.3",
+    "@cosmjs/proto-signing": "^0.32.3",
+    "@cosmjs/stargate": "^0.32.3",
+    "@endo/errors": "^1.2.5",
+    "@endo/far": "^1.1.5",
+    "@endo/nat": "^5.0.10",
+    "@endo/ses-ava": "^1.2.5",
     "@types/eslint": "^8",
     "@types/fs-extra": "^11",
     "@types/node": "^20.11.13",
diff --git a/multichain-testing/yarn.lock b/multichain-testing/yarn.lock
index 0f1b49cdc29..3a222121be9 100644
--- a/multichain-testing/yarn.lock
+++ b/multichain-testing/yarn.lock
@@ -5,18 +5,13 @@ __metadata:
   version: 8
   cacheKey: 10c0
 
-"@agoric/cosmic-proto@npm:0.4.1-dev-08f8549.0":
-  version: 0.4.1-dev-08f8549.0
-  resolution: "@agoric/cosmic-proto@npm:0.4.1-dev-08f8549.0"
+"@agoric/cosmic-proto@npm:0.4.1-dev-5b3e4d0.0":
+  version: 0.4.1-dev-5b3e4d0.0
+  resolution: "@agoric/cosmic-proto@npm:0.4.1-dev-5b3e4d0.0"
   dependencies:
-    "@cosmjs/amino": "npm:^0.32.3"
-    "@cosmjs/math": "npm:^0.32.3"
-    "@cosmjs/proto-signing": "npm:^0.32.3"
-    "@cosmjs/stargate": "npm:^0.32.3"
-    "@cosmjs/tendermint-rpc": "npm:^0.32.3"
-    "@endo/base64": "npm:^1.0.5"
-    "@endo/init": "npm:^1.1.2"
-  checksum: 10c0/556544ec6e4d433c1866f7890ba62a37d278d402bd6567d4e1205a8715df0364ee836c865e09e9214be856026f9a9c5ba1fa47635ac7b0522f3963b0dbc741bb
+    "@endo/base64": "npm:^1.0.7"
+    "@endo/init": "npm:^1.1.4"
+  checksum: 10c0/4452a494fcc5a3784b65777f7a370008e8e3ae69189d61247803a759a02767459c8eddcb5b72211324dbbe02c2eae91abf0ff7fd5f955693cdc1de50fc2770f5
   languageName: node
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@@ -91,7 +86,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@cosmjs/crypto@npm:^0.32.2, @cosmjs/crypto@npm:^0.32.3":
+"@cosmjs/crypto@npm:^0.32.3":
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   resolution: "@cosmjs/crypto@npm:0.32.3"
   dependencies:
@@ -136,7 +131,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@cosmjs/proto-signing@npm:^0.32.2, @cosmjs/proto-signing@npm:^0.32.3":
+"@cosmjs/proto-signing@npm:^0.32.3":
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   resolution: "@cosmjs/proto-signing@npm:0.32.3"
   dependencies:
@@ -162,7 +157,7 @@ __metadata:
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-"@cosmjs/stargate@npm:^0.32.2, @cosmjs/stargate@npm:^0.32.3":
+"@cosmjs/stargate@npm:^0.32.3":
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   resolution: "@cosmjs/stargate@npm:0.32.3"
   dependencies:
@@ -214,109 +209,109 @@ __metadata:
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-"@endo/base64@npm:^1.0.5":
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-  resolution: "@endo/base64@npm:1.0.5"
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+"@endo/base64@npm:^1.0.7":
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+  resolution: "@endo/base64@npm:1.0.7"
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+"@endo/env-options@npm:^1.1.6":
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-  resolution: "@endo/errors@npm:1.2.2"
+"@endo/errors@npm:^1.2.5":
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+  resolution: "@endo/errors@npm:1.2.5"
   dependencies:
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-  checksum: 10c0/d90baaf803b17130b83fbc562e253504a6a05e4843d63536e74578503f6bd937fdba3464c4d8eeb9df16b795639cd9c4aad143520525f9e54aa3e91dc5184c17
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-  resolution: "@endo/far@npm:1.1.2"
+"@endo/far@npm:^1.1.5":
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+    "@endo/pass-style": "npm:^1.4.3"
+  checksum: 10c0/8c50a28323ab1078d0cb6fce1d7fc6da4884247d76585f37f960a2a7134fc7f293075effaae34b41801b7508a1f75d32304c19db0597709727853c4a87eb4999
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-"@endo/init@npm:^1.1.2":
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-  resolution: "@endo/init@npm:1.1.2"
+"@endo/init@npm:^1.1.4":
+  version: 1.1.4
+  resolution: "@endo/init@npm:1.1.4"
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-    "@endo/eventual-send": "npm:^1.2.2"
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-    "@endo/promise-kit": "npm:^1.1.2"
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+    "@endo/base64": "npm:^1.0.7"
+    "@endo/eventual-send": "npm:^1.2.5"
+    "@endo/lockdown": "npm:^1.0.10"
+    "@endo/promise-kit": "npm:^1.1.5"
+  checksum: 10c0/9e915b3b888b7a9f1d563d532ad180dea987253d71e79eda1fcda8d287391611bcca369f2d9b89c59b9f24b3adc548816954e8eaefa4f7402c68585245a686a5
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-  version: 1.0.7
-  resolution: "@endo/lockdown@npm:1.0.7"
+"@endo/lockdown@npm:^1.0.10":
+  version: 1.0.10
+  resolution: "@endo/lockdown@npm:1.0.10"
   dependencies:
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-  checksum: 10c0/a9d8ed2c3feff80741abac0c27f8a2ab9e0d46456b5b3c1d3edcaf81b498c5449b43aaf8ee01b1517452b8be548a1156c172d105469e847b01398df42a428a1b
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+"@endo/nat@npm:^5.0.10":
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-"@endo/pass-style@npm:^1.4.0":
-  version: 1.4.0
-  resolution: "@endo/pass-style@npm:1.4.0"
+"@endo/pass-style@npm:^1.4.3":
+  version: 1.4.3
+  resolution: "@endo/pass-style@npm:1.4.3"
   dependencies:
-    "@endo/env-options": "npm:^1.1.4"
-    "@endo/errors": "npm:^1.2.2"
-    "@endo/eventual-send": "npm:^1.2.2"
-    "@endo/promise-kit": "npm:^1.1.2"
+    "@endo/env-options": "npm:^1.1.6"
+    "@endo/errors": "npm:^1.2.5"
+    "@endo/eventual-send": "npm:^1.2.5"
+    "@endo/promise-kit": "npm:^1.1.5"
     "@fast-check/ava": "npm:^1.1.5"
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-"@endo/promise-kit@npm:^1.1.2":
-  version: 1.1.2
-  resolution: "@endo/promise-kit@npm:1.1.2"
+"@endo/promise-kit@npm:^1.1.5":
+  version: 1.1.5
+  resolution: "@endo/promise-kit@npm:1.1.5"
   dependencies:
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-  checksum: 10c0/12bf81d5b3efd77f75c95d4d287a9b46f9f69adc9cb25586d5a25e1d01a5392fe2e268adf5e3f61ef77187f134ffeab9182deb1b9f35598fb14c9a89b38e3a88
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-"@endo/ses-ava@npm:^1.2.2":
-  version: 1.2.2
-  resolution: "@endo/ses-ava@npm:1.2.2"
+"@endo/ses-ava@npm:^1.2.5":
+  version: 1.2.5
+  resolution: "@endo/ses-ava@npm:1.2.5"
   dependencies:
-    "@endo/env-options": "npm:^1.1.4"
-    "@endo/init": "npm:^1.1.2"
-    ses: "npm:^1.5.0"
+    "@endo/env-options": "npm:^1.1.6"
+    "@endo/init": "npm:^1.1.4"
+    ses: "npm:^1.8.0"
   peerDependencies:
     ava: ^5.3.0 || ^6.1.2
-  checksum: 10c0/62b3747df53d34b986b75d6fd1c25f566448a4e62730afbaa9c4c8e27a7703c267cc6fb233a5e8deb45a68abfa2add048a4b5d4f55fd9790d7b7f0520ab384c4
+  checksum: 10c0/cabde169f565d9a61f5d41040599c43b5675f6220f66d4d6a56d351e1465434e94b52b1d664444fbd57d4b8700fa97ac9886fc806f5172552c3318269347c376
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@@ -3833,14 +3828,14 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
-    "@agoric/cosmic-proto": "npm:0.4.1-dev-08f8549.0"
-    "@cosmjs/crypto": "npm:^0.32.2"
-    "@cosmjs/proto-signing": "npm:^0.32.2"
-    "@cosmjs/stargate": "npm:^0.32.2"
-    "@endo/errors": "npm:^1.2.2"
-    "@endo/far": "npm:^1.1.2"
-    "@endo/nat": "npm:^5.0.7"
-    "@endo/ses-ava": "npm:^1.2.2"
+    "@agoric/cosmic-proto": "npm:0.4.1-dev-5b3e4d0.0"
+    "@cosmjs/crypto": "npm:^0.32.3"
+    "@cosmjs/proto-signing": "npm:^0.32.3"
+    "@cosmjs/stargate": "npm:^0.32.3"
+    "@endo/errors": "npm:^1.2.5"
+    "@endo/far": "npm:^1.1.5"
+    "@endo/nat": "npm:^5.0.10"
+    "@endo/ses-ava": "npm:^1.2.5"
     "@types/eslint": "npm:^8"
     "@types/fs-extra": "npm:^11"
     "@types/node": "npm:^20.11.13"
@@ -3909,12 +3904,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ses@npm:^1.5.0":
-  version: 1.5.0
-  resolution: "ses@npm:1.5.0"
+"ses@npm:^1.8.0":
+  version: 1.8.0
+  resolution: "ses@npm:1.8.0"
   dependencies:
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