diff --git a/package.json b/package.json
index 2c31e86c..e27473aa 100644
--- a/package.json
+++ b/package.json
@@ -121,7 +121,7 @@
     "conventional-recommended-bump": "^11.2.0",
     "dotenv": "^17.3.1",
     "drizzle-orm": "^0.45.1",
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "effect-mdx": "^0.2.2",
     "glob": "^13.0.3",
     "gray-matter": "^4.0.3",
@@ -176,6 +176,6 @@
   "resolutions": {
     "@effect/platform": "0.94.5",
     "@effect/platform-node": "0.104.1",
-    "effect": "3.19.19"
+    "effect": "3.21.0"
   }
 }
diff --git a/packages/analysis-core/package.json b/packages/analysis-core/package.json
index 1db8c9d0..e646fd77 100644
--- a/packages/analysis-core/package.json
+++ b/packages/analysis-core/package.json
@@ -28,7 +28,7 @@
 		"test:all": "bun scripts/test-integrated.ts all --coverage"
 	},
 	"dependencies": {
-		"effect": "3.19.19",
+		"effect": "3.21.0",
 		"typescript": "^5.5.0"
 	}
 }
\ No newline at end of file
diff --git a/packages/api-server/package.json b/packages/api-server/package.json
index 5eeff2d2..bac34c6a 100644
--- a/packages/api-server/package.json
+++ b/packages/api-server/package.json
@@ -60,7 +60,7 @@
     "@opentelemetry/semantic-conventions": "^1.38.0",
     "@vercel/kv": "^3.0.0",
     "drizzle-orm": "^0.45.1",
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "next": "^16.0.10",
     "postgres": "^3.4.8",
     "react": "^19.2.3",
diff --git a/packages/ep-admin/package.json b/packages/ep-admin/package.json
index 8ad720ee..c21d5c92 100644
--- a/packages/ep-admin/package.json
+++ b/packages/ep-admin/package.json
@@ -11,7 +11,7 @@
     "conventional-commits-parser": "^6.2.1",
     "conventional-recommended-bump": "^11.2.0",
     "dotenv": "^17.2.3",
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "effect-cli-tui": "^2.2.0",
     "effect-env": "^0.4.1",
     "glob": "^13.0.1",
diff --git a/packages/ep-cli/package.json b/packages/ep-cli/package.json
index 6dd4ffac..02d7f9a3 100644
--- a/packages/ep-cli/package.json
+++ b/packages/ep-cli/package.json
@@ -26,7 +26,7 @@
     "@effect/platform-node": "0.104.1",
     "@effect/rpc": "0.73.2",
     "@effect/sql": "0.49.0",
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "effect-cli-tui": "^2.2.0",
     "effect-env": "^0.4.1"
   },
diff --git a/packages/ep-shared-services/package.json b/packages/ep-shared-services/package.json
index 9141bf52..0cd72600 100644
--- a/packages/ep-shared-services/package.json
+++ b/packages/ep-shared-services/package.json
@@ -59,7 +59,7 @@
     "node": ">=18.0.0"
   },
   "dependencies": {
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "@effect/platform": "0.94.5",
     "@effect/platform-node": "0.104.1"
   },
diff --git a/packages/mcp-transport/package.json b/packages/mcp-transport/package.json
index 9eb52691..4a747184 100644
--- a/packages/mcp-transport/package.json
+++ b/packages/mcp-transport/package.json
@@ -42,7 +42,7 @@
     "@opentelemetry/sdk-trace-base": "^2.0.0",
     "@opentelemetry/sdk-trace-node": "^2.2.0",
     "@opentelemetry/semantic-conventions": "^1.38.0",
-    "effect": "3.19.19",
+    "effect": "3.21.0",
     "zod": "^4.3.6"
   },
   "devDependencies": {
diff --git a/packages/pipeline-state/package.json b/packages/pipeline-state/package.json
index 4a023d6e..da426194 100644
--- a/packages/pipeline-state/package.json
+++ b/packages/pipeline-state/package.json
@@ -46,7 +46,7 @@
   "license": "MIT",
   "dependencies": {
     "@effect/platform": "0.94.5",
-    "effect": "3.19.19"
+    "effect": "3.21.0"
   },
   "devDependencies": {
     "@effect/schema": "^0.75.5",
diff --git a/packages/toolkit/package.json b/packages/toolkit/package.json
index e12053c8..02169151 100644
--- a/packages/toolkit/package.json
+++ b/packages/toolkit/package.json
@@ -44,13 +44,13 @@
     "@effect/platform": "0.94.5",
     "@effect/platform-node": "0.104.1",
     "@effect/schema": "^0.75.5",
-    "effect": "3.19.19"
+    "effect": "3.21.0"
   },
   "peerDependencies": {
     "@effect/platform": "0.94.5",
     "@effect/platform-node": "0.104.1",
     "@effect/schema": "^0.75.5",
-    "effect": "3.19.19"
+    "effect": "3.21.0"
   },
   "devDependencies": {
     "@types/node": "^25.0.6",