diff --git a/packages/json-rpc/package.json b/packages/json-rpc/package.json
index 3539ff68..4d949fa5 100644
--- a/packages/json-rpc/package.json
+++ b/packages/json-rpc/package.json
@@ -47,9 +47,14 @@
   },
   "devDependencies": {
     "eslint": "^7.5",
+    "glob": "^7.1.6",
+    "jasmine": "^3.5",
+    "jasmine-spec-reporter": "^6",
     "karma": "^6.1.1",
     "nyc": "^15.1.0",
     "prettier": "^2.0.5",
+    "ses": "^0.11.0",
+    "source-map-support": "^0.5.19",
     "typedoc": "^0.20",
     "typescript": "~4.0",
     "webpack": "^5.32.0"
diff --git a/yarn.lock b/yarn.lock
index ba3cf267..4dd98c01 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -553,9 +553,14 @@ __metadata:
   dependencies:
     "@cosmjs/stream": ^0.25.2
     eslint: ^7.5
+    glob: ^7.1.6
+    jasmine: ^3.5
+    jasmine-spec-reporter: ^6
     karma: ^6.1.1
     nyc: ^15.1.0
     prettier: ^2.0.5
+    ses: ^0.11.0
+    source-map-support: ^0.5.19
     typedoc: ^0.20
     typescript: ~4.0
     webpack: ^5.32.0