diff --git a/package.json b/package.json
index ddbb225..864175b 100644
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "better-auth": "1.6.4",
     "d3": "^7.9.0",
     "drizzle-orm": "^0.45.1",
-    "effect": "4.0.0-beta.51",
+    "effect": "4.0.0-beta.59",
     "marked": "^18.0.0",
     "shiki": "^4.0.2"
   },
diff --git a/packages/lab-cli/package.json b/packages/lab-cli/package.json
index 866acb9..9aec4d9 100644
--- a/packages/lab-cli/package.json
+++ b/packages/lab-cli/package.json
@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "@acoyfellow/lab": "^0.0.3",
-    "effect": "4.0.0-beta.51"
+    "effect": "4.0.0-beta.59"
   },
   "devDependencies": {
     "@types/node": "^25.5.0",
diff --git a/packages/lab-mcp/package.json b/packages/lab-mcp/package.json
index b094263..7356543 100644
--- a/packages/lab-mcp/package.json
+++ b/packages/lab-mcp/package.json
@@ -31,7 +31,7 @@
   "dependencies": {
     "@acoyfellow/lab": "^0.0.3",
     "@modelcontextprotocol/sdk": "1.29.0",
-    "effect": "4.0.0-beta.51",
+    "effect": "4.0.0-beta.59",
     "zod": "^4.0.0"
   },
   "devDependencies": {
diff --git a/packages/lab/package.json b/packages/lab/package.json
index 739a1fd..c0660ab 100644
--- a/packages/lab/package.json
+++ b/packages/lab/package.json
@@ -37,7 +37,7 @@
     "prepublishOnly": "tsc -p tsconfig.json"
   },
   "devDependencies": {
-    "effect": "4.0.0-beta.51",
+    "effect": "4.0.0-beta.59",
     "typescript": "^5.9.3"
   }
 }