diff --git a/packages/json-api/package.json b/packages/json-api/package.json
index c971a6fc64..7a88f98dea 100644
--- a/packages/json-api/package.json
+++ b/packages/json-api/package.json
@@ -89,7 +89,7 @@
     "@warp-drive/core-types": "workspace:0.0.0-alpha.98",
     "@warp-drive/internal-config": "workspace:5.4.0-alpha.112",
     "ember-source": "~5.12.0",
-    "expect-type": "^0.19.0",
+    "expect-type": "^0.20.0",
     "pnpm-sync-dependencies-meta-injected": "0.0.14",
     "typescript": "^5.4.5",
     "vite": "^5.2.11"
diff --git a/packages/model/package.json b/packages/model/package.json
index 03716affee..02b9c60fe3 100644
--- a/packages/model/package.json
+++ b/packages/model/package.json
@@ -119,7 +119,7 @@
     "@warp-drive/internal-config": "workspace:5.4.0-alpha.112",
     "decorator-transforms": "^2.0.0",
     "ember-source": "~5.12.0",
-    "expect-type": "^0.19.0",
+    "expect-type": "^0.20.0",
     "pnpm-sync-dependencies-meta-injected": "0.0.14",
     "typescript": "^5.4.5",
     "vite": "^5.2.11"
diff --git a/packages/store/package.json b/packages/store/package.json
index 18a06c8ac0..ba60bcb40c 100644
--- a/packages/store/package.json
+++ b/packages/store/package.json
@@ -77,7 +77,7 @@
     "@warp-drive/internal-config": "workspace:5.4.0-alpha.112",
     "decorator-transforms": "^2.0.0",
     "ember-source": "~5.12.0",
-    "expect-type": "^0.19.0",
+    "expect-type": "^0.20.0",
     "pnpm-sync-dependencies-meta-injected": "0.0.14",
     "typescript": "^5.4.5",
     "vite": "^5.2.11"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7bbedabb17..73be6d3940 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1183,8 +1183,8 @@ importers:
         specifier: ~5.12.0
         version: 5.12.0(@glimmer/component@1.1.2)(@glint/template@1.4.0)
       expect-type:
-        specifier: ^0.19.0
-        version: 0.19.0
+        specifier: ^0.20.0
+        version: 0.20.0
       pnpm-sync-dependencies-meta-injected:
         specifier: 0.0.14
         version: 0.0.14
@@ -1364,8 +1364,8 @@ importers:
         specifier: ~5.12.0
         version: 5.12.0(@glimmer/component@1.1.2)(@glint/template@1.4.0)
       expect-type:
-        specifier: ^0.19.0
-        version: 0.19.0
+        specifier: ^0.20.0
+        version: 0.20.0
       pnpm-sync-dependencies-meta-injected:
         specifier: 0.0.14
         version: 0.0.14
@@ -1792,8 +1792,8 @@ importers:
         specifier: ~5.12.0
         version: 5.12.0(@glimmer/component@1.1.2)(@glint/template@1.4.0)
       expect-type:
-        specifier: ^0.19.0
-        version: 0.19.0
+        specifier: ^0.20.0
+        version: 0.20.0
       pnpm-sync-dependencies-meta-injected:
         specifier: 0.0.14
         version: 0.0.14
@@ -13284,8 +13284,8 @@ packages:
     dependencies:
       homedir-polyfill: 1.0.3
 
-  /expect-type@0.19.0:
-    resolution: {integrity: sha512-piv9wz3IrAG4Wnk2A+n2VRCHieAyOSxrRLU872Xo6nyn39kYXKDALk4OcqnvLRnFvkz659CnWC8MWZLuuQnoqg==}
+  /expect-type@0.20.0:
+    resolution: {integrity: sha512-uHaC9LYNv6BcW+8SvXcwUUDCrrUxt3GSa61DFvTHj8JC+M0hekMFBwMlCarLQDk5bbpZ2vStpnQPIwRuV98YMw==}
     engines: {node: '>=12.0.0'}
     dev: true