diff --git a/bun.lock b/bun.lock
index 2ee3f61ad..0e5e9d84b 100644
--- a/bun.lock
+++ b/bun.lock
@@ -776,7 +776,7 @@
         "vitest": "catalog:",
       },
       "peerDependencies": {
-        "effect": ">=4.0.0-rc.113",
+        "effect": ">=4.0.0-rc.118",
       },
     },
     "packages/email": {
diff --git a/packages/effect-sdk/README.md b/packages/effect-sdk/README.md
index 9b03e401c..43b2115e7 100644
--- a/packages/effect-sdk/README.md
+++ b/packages/effect-sdk/README.md
@@ -51,7 +51,7 @@ The Workers preset uses a custom flushable tracer + Effect logger — Workers do
 ```typescript
 import * as MapleCloudflareSDK from "@maple-dev/effect-sdk/cloudflare"
 import { Layer } from "effect"
-import { HttpRouter } from "effect/unstable/http"
+import { HttpRouter } from "effect/http"
 
 const telemetry = MapleCloudflareSDK.make({
 	serviceName: "my-worker",
diff --git a/packages/effect-sdk/package.json b/packages/effect-sdk/package.json
index a09cab66f..77cde7b7c 100644
--- a/packages/effect-sdk/package.json
+++ b/packages/effect-sdk/package.json
@@ -55,6 +55,8 @@
 	},
 	"scripts": {
 		"build": "tsdown",
+		"prepack": "MAPLE_EFFECT_STABLE_PATHS=1 bun run build",
+		"postpack": "bun run build",
 		"typecheck": "tsc --noEmit",
 		"test": "vitest run"
 	},
@@ -72,6 +74,6 @@
 		"vitest": "catalog:"
 	},
 	"peerDependencies": {
-		"effect": ">=4.0.0-rc.113"
+		"effect": ">=4.0.0-rc.118"
 	}
 }
diff --git a/packages/effect-sdk/tsdown.config.ts b/packages/effect-sdk/tsdown.config.ts
index cb9ff0a72..3c4380dc3 100644
--- a/packages/effect-sdk/tsdown.config.ts
+++ b/packages/effect-sdk/tsdown.config.ts
@@ -1,5 +1,11 @@
 import { defineConfig } from "tsdown"
 
+// Effect rc.118 promoted `effect/unstable/{http,observability}` to
+// `effect/{http,observability}` and dropped the old paths. The monorepo still
+// builds against an earlier rc, so the source keeps the unstable paths and the
+// published tarball (`prepack`) is built with them rewritten.
+const stableEffectPaths = process.env.MAPLE_EFFECT_STABLE_PATHS === "1"
+
 export default defineConfig({
 	entry: {
 		"index.server": "./src/index.server.ts",
@@ -18,4 +24,14 @@ export default defineConfig({
 	deps: {
 		neverBundle: ["effect"],
 	},
+	plugins: stableEffectPaths
+		? [
+				{
+					name: "maple:effect-stable-paths",
+					renderChunk(code) {
+						return code.replaceAll(/(["'])effect\/unstable\//g, "$1effect/")
+					},
+				},
+			]
+		: [],
 })