diff --git a/benchmarks/basic/package.json b/benchmarks/basic/package.json
index 7b8667dd..73e18dab 100644
--- a/benchmarks/basic/package.json
+++ b/benchmarks/basic/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "openworkflow": "*",
-    "postgres": "^3.4.9"
+    "postgres": "^4.0.0"
   },
   "devDependencies": {
     "tsx": "^4.23.15"
diff --git a/examples/basic/package.json b/examples/basic/package.json
index fd322594..9476b97f 100644
--- a/examples/basic/package.json
+++ b/examples/basic/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "openworkflow": "*",
-    "postgres": "^3.4.9"
+    "postgres": "^4.0.0"
   },
   "devDependencies": {
     "tsx": "^4.23.15"
diff --git a/examples/declare-workflow/package.json b/examples/declare-workflow/package.json
index 5f949d8b..73a74706 100644
--- a/examples/declare-workflow/package.json
+++ b/examples/declare-workflow/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "openworkflow": "*",
-    "postgres": "^3.4.9"
+    "postgres": "^4.0.0"
   },
   "devDependencies": {
     "tsx": "^4.23.15"
diff --git a/examples/with-schema-validation/package.json b/examples/with-schema-validation/package.json
index 57efa300..e7aff8d6 100644
--- a/examples/with-schema-validation/package.json
+++ b/examples/with-schema-validation/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "arktype": "^2.2.8",
     "openworkflow": "*",
-    "postgres": "^3.4.9",
+    "postgres": "^4.0.0",
     "valibot": "^1.5.0",
     "yup": "^1.7.1",
     "zod": "^4.6.7"
diff --git a/package-lock.json b/package-lock.json
index dbf16bb0..4a6ca688 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -299,7 +299,7 @@
       "name": "benchmark-basic",
       "dependencies": {
         "openworkflow": "*",
-        "postgres": "^3.4.9"
+        "postgres": "^4.0.0"
       },
       "devDependencies": {
         "tsx": "^4.23.15"
@@ -309,7 +309,7 @@
       "name": "example-basic",
       "dependencies": {
         "openworkflow": "*",
-        "postgres": "^3.4.9"
+        "postgres": "^4.0.0"
       },
       "devDependencies": {
         "tsx": "^4.23.15"
@@ -319,7 +319,7 @@
       "name": "example-declare-workflow",
       "dependencies": {
         "openworkflow": "*",
-        "postgres": "^3.4.9"
+        "postgres": "^4.0.0"
       },
       "devDependencies": {
         "tsx": "^4.23.15"
@@ -347,7 +347,7 @@
       "dependencies": {
         "arktype": "^2.2.8",
         "openworkflow": "*",
-        "postgres": "^3.4.9",
+        "postgres": "^4.0.0",
         "valibot": "^1.5.0",
         "yup": "^1.7.1",
         "zod": "^4.6.7"
@@ -12031,12 +12031,12 @@
       }
     },
     "node_modules/postgres": {
-      "version": "3.4.9",
-      "resolved": "https://registry.npmjs.org/postgres/-/postgres-3.4.9.tgz",
-      "integrity": "sha512-GD3qdB0x1z9xgFI6cdRD6xu2Sp2WCOEoe3mtnyB5Ee0XrrL5Pe+e4CCnJrRMnL1zYtRDZmQQVbvOttLnKDLnaw==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/postgres/-/postgres-4.0.0.tgz",
+      "integrity": "sha512-kBh8qXtcvvIAc00DftQyOxz7M/3Zxww1tRMXZPLzipNXXl5PIzHml+9zB3Mrge2U8ldc0WF1ZdLp1iYQi7Kh3A==",
       "license": "Unlicense",
       "engines": {
-        "node": ">=12"
+        "node": ">=20"
       },
       "funding": {
         "type": "individual",
@@ -14731,7 +14731,7 @@
       },
       "peerDependencies": {
         "@opentelemetry/api": "1",
-        "postgres": "^3.4.9"
+        "postgres": "^4.0.0"
       },
       "peerDependenciesMeta": {
         "@opentelemetry/api": {
diff --git a/packages/openworkflow/package.json b/packages/openworkflow/package.json
index d715257b..6e9e016a 100644
--- a/packages/openworkflow/package.json
+++ b/packages/openworkflow/package.json
@@ -69,7 +69,7 @@
   },
   "peerDependencies": {
     "@opentelemetry/api": "1",
-    "postgres": "^3.4.9"
+    "postgres": "^4.0.0"
   },
   "peerDependenciesMeta": {
     "@opentelemetry/api": {