diff --git a/packages/coordination/package.json b/packages/coordination/package.json
index ebe83ab..f88cda1 100644
--- a/packages/coordination/package.json
+++ b/packages/coordination/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@cobusgreyling/outerloop-core": "workspace:*",
-    "zod": "^3.25.67"
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^26.0.0",
diff --git a/packages/core/package.json b/packages/core/package.json
index b85a6cf..386bd3b 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -28,7 +28,7 @@
     "clean": "rm -rf dist"
   },
   "dependencies": {
-    "zod": "^3.25.67"
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^26.0.0",
diff --git a/packages/core/src/schemas.ts b/packages/core/src/schemas.ts
index 985ab10..564358d 100644
--- a/packages/core/src/schemas.ts
+++ b/packages/core/src/schemas.ts
@@ -59,7 +59,7 @@ export const EvidencePackageSchema = z.object({
   }),
   verification: z.object({
     tests: z.array(TestResultSchema),
-    staticAnalysis: z.record(z.unknown()).optional(),
+    staticAnalysis: z.record(z.string(), z.unknown()).optional(),
     manualChecks: z.array(z.string()).optional(),
   }),
   observability: z.object({
@@ -77,7 +77,7 @@ export const EvidencePackageSchema = z.object({
     technical: z.string(),
     decisionRelevant: z.string(),
   }),
-  rawArtifacts: z.record(z.unknown()).default({}),
+  rawArtifacts: z.record(z.string(), z.unknown()).default({}),
   harnessBoundary: HarnessSpecRefSchema,
 });
 
diff --git a/packages/taste/package.json b/packages/taste/package.json
index 84cad62..8f951cf 100644
--- a/packages/taste/package.json
+++ b/packages/taste/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "@cobusgreyling/outerloop-core": "workspace:*",
-    "zod": "^3.25.67"
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^26.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 58c1e08..317e37f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -179,8 +179,8 @@ importers:
         specifier: workspace:*
         version: link:../core
       zod:
-        specifier: ^3.25.67
-        version: 3.25.76
+        specifier: ^4.4.3
+        version: 4.4.3
     devDependencies:
       '@types/node':
         specifier: ^26.0.0
@@ -195,8 +195,8 @@ importers:
   packages/core:
     dependencies:
       zod:
-        specifier: ^3.25.67
-        version: 3.25.76
+        specifier: ^4.4.3
+        version: 4.4.3
     devDependencies:
       '@types/node':
         specifier: ^26.0.0
@@ -343,8 +343,8 @@ importers:
         specifier: workspace:*
         version: link:../core
       zod:
-        specifier: ^3.25.67
-        version: 3.25.76
+        specifier: ^4.4.3
+        version: 4.4.3
     devDependencies:
       '@types/node':
         specifier: ^26.0.0
@@ -1713,8 +1713,8 @@ packages:
   yoga-layout@3.2.1:
     resolution: {integrity: sha512-0LPOt3AxKqMdFBZA3HBAt/t/8vIKq7VaQYbuA8WxCgung+p9TVyKRYdpvCb80HcdTN2NkbIKbhNwKUfm3tQywQ==}
 
-  zod@3.25.76:
-    resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
+  zod@4.4.3:
+    resolution: {integrity: sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==}
 
 snapshots:
 
@@ -2929,4 +2929,4 @@ snapshots:
 
   yoga-layout@3.2.1: {}
 
-  zod@3.25.76: {}
+  zod@4.4.3: {}