diff --git a/did.py b/pyvckit/did.py
similarity index 100%
rename from did.py
rename to pyvckit/did.py
diff --git a/sign.py b/pyvckit/sign.py
similarity index 100%
rename from sign.py
rename to pyvckit/sign.py
diff --git a/sign_vc.py b/pyvckit/sign_vc.py
similarity index 100%
rename from sign_vc.py
rename to pyvckit/sign_vc.py
diff --git a/sign_vp.py b/pyvckit/sign_vp.py
similarity index 100%
rename from sign_vp.py
rename to pyvckit/sign_vp.py
diff --git a/pyvckit/templates.py b/pyvckit/templates.py
new file mode 100644
index 0000000..210b833
--- /dev/null
+++ b/pyvckit/templates.py
@@ -0,0 +1,67 @@
+# templates
+
+
+credential_tmpl = {
+    "@context": "https://www.w3.org/2018/credentials/v1",
+    "id": "http://example.org/credentials/3731",
+    "type": ["VerifiableCredential"],
+    "credentialSubject": {
+        "id": "did:key:z6MkgGXSJoacuuNdwU1rGfPpFH72GACnzykKTxzCCTZs6Z2M",
+    },
+    "issuer": None,
+    "issuanceDate": None
+}
+
+proof_tmpl = {
+    '@context':'https://w3id.org/security/v2',
+    'type': 'Ed25519Signature2018',
+    'proofPurpose': 'assertionMethod',
+    'verificationMethod': None,
+    'created': None
+}
+
+presentation_tmpl = {
+    "@context": ["https://www.w3.org/2018/credentials/v1"],
+    "id": "http://example.org/presentations/3731",
+    "type": ["VerifiablePresentation"],
+    "holder": "",
+    "verifiableCredential": []
+}
+
+
+did_document_tmpl = {
+  "@context": [
+    "https://www.w3.org/ns/did/v1",
+    {
+      "Ed25519VerificationKey2018": "https://w3id.org/security#Ed25519VerificationKey2018",
+      "publicKeyJwk": {
+        "@id": "https://w3id.org/security#publicKeyJwk",
+        "@type": "@json"
+      }
+    }
+  ],
+  "id": "",
+  "verificationMethod": [
+    {
+      "id": "",
+      "type": "Ed25519VerificationKey2018",
+      "controller": "",
+      "publicKeyJwk": {
+        "kty": "OKP",
+        "crv": "Ed25519",
+        "x": ""
+      }
+    }
+  ],
+  "authentication": [
+  ],
+  "assertionMethod": [
+  ],
+  "service": [
+    {
+      "id": "",
+      "type": "RevocationBitmap2022",
+      "serviceEndpoint": "data:application/octet-stream;base64,eJyzMmAAAwADKABr"
+    }
+  ]
+}
diff --git a/utils.py b/pyvckit/utils.py
similarity index 100%
rename from utils.py
rename to pyvckit/utils.py
diff --git a/verify.py b/pyvckit/verify.py
similarity index 100%
rename from verify.py
rename to pyvckit/verify.py
diff --git a/verify_vc.py b/pyvckit/verify_vc.py
similarity index 100%
rename from verify_vc.py
rename to pyvckit/verify_vc.py
diff --git a/verify_vp.py b/pyvckit/verify_vp.py
similarity index 100%
rename from verify_vp.py
rename to pyvckit/verify_vp.py