diff --git a/.cspell.jsonc b/.cspell.jsonc
index 301e2bf..01c2e79 100644
--- a/.cspell.jsonc
+++ b/.cspell.jsonc
@@ -9,6 +9,7 @@
     "ecies",
     "eciespy",
     "fastapi",
+    "pydantic",
     "secp256k1",
     "Spacefile",
     "uvicorn",
diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index c01713c..2733f52 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -24,4 +24,4 @@ jobs:
         with:
           access_token: ${{ secrets.ACCESS_TOKEN }}
           project_id: ${{ secrets.PROJECT_ID }}
-          space_release: true
+          space_push: true
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dfa1901..db26302 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,10 +19,4 @@ jobs:
           cache: "poetry"
 
       - run: poetry export -f requirements.txt -o requirements.txt --without=dev
-      - run: poetry install --only main
-
-      - uses: neobrains/space-pipe@v0.5
-        with:
-          access_token: ${{ secrets.ACCESS_TOKEN }}
-          project_id: ${{ secrets.PROJECT_ID }}
-          space_push: true
+      - run: poetry install
diff --git a/main.py b/main.py
index 3d0fba0..973af6f 100644
--- a/main.py
+++ b/main.py
@@ -1,17 +1,18 @@
 from typing import Optional
 
 from ecies import decrypt, encrypt
-from fastapi import FastAPI, Form, HTTPException
-from fastapi.responses import Response
+from fastapi import FastAPI, Form, Response
+from fastapi.responses import JSONResponse
+from pydantic import BaseModel
 
 app = FastAPI()
 
 
-def resp_string(msg):
-    return Response(content=msg, media_type="plain/text")
+class Error(BaseModel):
+    detail: str
 
 
-@app.post("/")
+@app.post("/", responses={400: {"model": Error}})
 async def encrypt_decrypt(
     prv: Optional[str] = Form(None),
     pub: Optional[str] = Form(None),
@@ -22,12 +23,20 @@ async def encrypt_decrypt(
             decrypted = decrypt(prv, bytes.fromhex(data))
             return resp_string(decrypted)
         except ValueError:
-            raise HTTPException(status_code=400, detail="Invalid private key")
+            return resp_error("Invalid private key or data")
     elif pub and data:
         try:
             encrypted = encrypt(pub, data.encode())
             return resp_string(encrypted.hex())
         except ValueError:
-            raise HTTPException(status_code=400, detail="Invalid public key")
+            return resp_error("Invalid public key or data")
     else:
-        raise HTTPException(status_code=400, detail="Invalid request")
+        return resp_error("Invalid request")
+
+
+def resp_string(msg):
+    return Response(content=msg, media_type="plain/text")
+
+
+def resp_error(msg):
+    return JSONResponse(content={"detail": msg}, status_code=400)
diff --git a/pyproject.toml b/pyproject.toml
index 261ade2..2e98e34 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,6 +3,7 @@ authors = ["Weiliang Li <to.be.impressive@gmail.com>"]
 description = ""
 license = "MIT"
 name = "eciespy-demo"
+package-mode = false
 version = "0.1.0"
 
 [tool.poetry.dependencies]