diff --git a/CHANGES.md b/CHANGES.md
index 6a2c92c..56410c8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 Changelog
 =========
+0.0.15 (Aug 1st 2019)
+------------------
+- Add cryptography in package  
+
 0.0.12 (Apr 23th 2019)
 ------------------
 - Support select jwt sign key by kid
diff --git a/Pipfile b/Pipfile
index 5f83dc8..12e5998 100644
--- a/Pipfile
+++ b/Pipfile
@@ -8,6 +8,7 @@ name = "pypi"
 "django" = "==2.2.1"
 "PyJWT" = "==1.6.1"
 "requests" = "==2.20.0"
+"cryptography" = "==2.3"
 
 [dev-packages]
 "flake8" = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index 2ad9b6d..0584f39 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "83a3eb08f202611783b6ae2772c2be028ac09e5d5521c54f1fcfdb574d035688"
+            "sha256": "e0b03167fc3395701ad89a427edb75dc3f377fa5ba2857216cab00ce57d64bf6"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -16,6 +16,13 @@
         ]
     },
     "default": {
+        "asn1crypto": {
+            "hashes": [
+                "sha256:2f1adbb7546ed199e3c90ef23ec95c5cf3585bac7d11fb7eb562a3fe89c64e87",
+                "sha256:9d5c20441baf0cb60a4ac34cc447c6c189024b6b4c6cd7877034f4965c464e49"
+            ],
+            "version": "==0.24.0"
+        },
         "certifi": {
             "hashes": [
                 "sha256:046832c04d4e752f37383b628bc601a7ea7211496b4638f6514d0e5b9acc4939",
@@ -23,6 +30,39 @@
             ],
             "version": "==2019.6.16"
         },
+        "cffi": {
+            "hashes": [
+                "sha256:041c81822e9f84b1d9c401182e174996f0bae9991f33725d059b771744290774",
+                "sha256:046ef9a22f5d3eed06334d01b1e836977eeef500d9b78e9ef693f9380ad0b83d",
+                "sha256:066bc4c7895c91812eff46f4b1c285220947d4aa46fa0a2651ff85f2afae9c90",
+                "sha256:066c7ff148ae33040c01058662d6752fd73fbc8e64787229ea8498c7d7f4041b",
+                "sha256:2444d0c61f03dcd26dbf7600cf64354376ee579acad77aef459e34efcb438c63",
+                "sha256:300832850b8f7967e278870c5d51e3819b9aad8f0a2c8dbe39ab11f119237f45",
+                "sha256:34c77afe85b6b9e967bd8154e3855e847b70ca42043db6ad17f26899a3df1b25",
+                "sha256:46de5fa00f7ac09f020729148ff632819649b3e05a007d286242c4882f7b1dc3",
+                "sha256:4aa8ee7ba27c472d429b980c51e714a24f47ca296d53f4d7868075b175866f4b",
+                "sha256:4d0004eb4351e35ed950c14c11e734182591465a33e960a4ab5e8d4f04d72647",
+                "sha256:4e3d3f31a1e202b0f5a35ba3bc4eb41e2fc2b11c1eff38b362de710bcffb5016",
+                "sha256:50bec6d35e6b1aaeb17f7c4e2b9374ebf95a8975d57863546fa83e8d31bdb8c4",
+                "sha256:55cad9a6df1e2a1d62063f79d0881a414a906a6962bc160ac968cc03ed3efcfb",
+                "sha256:5662ad4e4e84f1eaa8efce5da695c5d2e229c563f9d5ce5b0113f71321bcf753",
+                "sha256:59b4dc008f98fc6ee2bb4fd7fc786a8d70000d058c2bbe2698275bc53a8d3fa7",
+                "sha256:73e1ffefe05e4ccd7bcea61af76f36077b914f92b76f95ccf00b0c1b9186f3f9",
+                "sha256:a1f0fd46eba2d71ce1589f7e50a9e2ffaeb739fb2c11e8192aa2b45d5f6cc41f",
+                "sha256:a2e85dc204556657661051ff4bab75a84e968669765c8a2cd425918699c3d0e8",
+                "sha256:a5457d47dfff24882a21492e5815f891c0ca35fefae8aa742c6c263dac16ef1f",
+                "sha256:a8dccd61d52a8dae4a825cdbb7735da530179fea472903eb871a5513b5abbfdc",
+                "sha256:ae61af521ed676cf16ae94f30fe202781a38d7178b6b4ab622e4eec8cefaff42",
+                "sha256:b012a5edb48288f77a63dba0840c92d0504aa215612da4541b7b42d849bc83a3",
+                "sha256:d2c5cfa536227f57f97c92ac30c8109688ace8fa4ac086d19d0af47d134e2909",
+                "sha256:d42b5796e20aacc9d15e66befb7a345454eef794fdb0737d1af593447c6c8f45",
+                "sha256:dee54f5d30d775f525894d67b1495625dd9322945e7fee00731952e0368ff42d",
+                "sha256:e070535507bd6aa07124258171be2ee8dfc19119c28ca94c9dfb7efd23564512",
+                "sha256:e1ff2748c84d97b065cc95429814cdba39bcbd77c9c85c89344b317dc0d9cbff",
+                "sha256:ed851c75d1e0e043cbf5ca9a8e1b13c4c90f3fbd863dacb01c0808e2b5204201"
+            ],
+            "version": "==1.12.3"
+        },
         "chardet": {
             "hashes": [
                 "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
@@ -30,6 +70,31 @@
             ],
             "version": "==3.0.4"
         },
+        "cryptography": {
+            "hashes": [
+                "sha256:21af753934f2f6d1a10fe8f4c0a64315af209ef6adeaee63ca349797d747d687",
+                "sha256:27bb401a20a838d6d0ea380f08c6ead3ccd8c9d8a0232dc9adcc0e4994576a66",
+                "sha256:29720c4253263cff9aea64585adbbe85013ba647f6e98367efff9db2d7193ded",
+                "sha256:2a35b7570d8f247889784010aac8b384fd2e4a47b33e15c4a60b45a7c1944120",
+                "sha256:42c531a6a354407f42ee07fda5c2c0dc822cf6d52744949c182f2b295fbd4183",
+                "sha256:5eb86f03f9c4f0ac2336ac5431271072ddf7ecc76b338e26366732cfac58aa19",
+                "sha256:67f7f57eae8dede577f3f7775957f5bec93edd6bdb6ce597bb5b28e1bdf3d4fb",
+                "sha256:6ec84edcbc966ae460560a51a90046503ff0b5b66157a9efc61515c68059f6c8",
+                "sha256:7ba834564daef87557e7fcd35c3c3183a4147b0b3a57314e53317360b9b201b3",
+                "sha256:7d7f084cbe1fdb82be5a0545062b59b1ad3637bc5a48612ac2eb428ff31b31ea",
+                "sha256:82409f5150e529d699e5c33fa8fd85e965104db03bc564f5f4b6a9199e591f7c",
+                "sha256:87d092a7c2a44e5f7414ab02fb4145723ebba411425e1a99773531dd4c0e9b8d",
+                "sha256:8c56ef989342e42b9fcaba7c74b446f0cc9bed546dd00034fa7ad66fc00307ef",
+                "sha256:9449f5d4d7c516a6118fa9210c4a00f34384cb1d2028672100ee0c6cce49d7f6",
+                "sha256:bc2301170986ad82d9349a91eb8884e0e191209c45f5541b16aa7c0cfb135978",
+                "sha256:c132bab45d4bd0fff1d3fe294d92b0a6eb8404e93337b3127bdec9f21de117e6",
+                "sha256:c3d945b7b577f07a477700f618f46cbc287af3a9222cd73035c6ef527ef2c363",
+                "sha256:cee18beb4c807b5c0b178f4fa2fae03cef9d51821a358c6890f8b23465b7e5d2",
+                "sha256:d01dfc5c2b3495184f683574e03c70022674ca9a7be88589c5aba130d835ea90"
+            ],
+            "index": "pypi",
+            "version": "==2.3"
+        },
         "django": {
             "hashes": [
                 "sha256:6fcc3cbd55b16f9a01f37de8bcbe286e0ea22e87096557f1511051780338eaea",
@@ -53,6 +118,12 @@
             ],
             "version": "==2.7"
         },
+        "pycparser": {
+            "hashes": [
+                "sha256:a988718abfad80b6b157acce7bf130a30876d27603738ac39f140993246b25b3"
+            ],
+            "version": "==2.19"
+        },
         "pyjwt": {
             "hashes": [
                 "sha256:bca523ef95586d3a8a5be2da766fe6f82754acba27689c984e28e77a12174593",
@@ -76,6 +147,13 @@
             "index": "pypi",
             "version": "==2.20.0"
         },
+        "six": {
+            "hashes": [
+                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
+                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+            ],
+            "version": "==1.12.0"
+        },
         "sqlparse": {
             "hashes": [
                 "sha256:40afe6b8d4b1117e7dff5504d7a8ce07d9a1b15aeeade8a2d10f130a834f8177",
@@ -122,11 +200,11 @@
         },
         "flake8": {
             "hashes": [
-                "sha256:859996073f341f2670741b51ec1e67a01da142831aa1fdc6242dbf88dffbe661",
-                "sha256:a796a115208f5c03b18f332f7c11729812c8c3ded6c46319c59b53efd3819da8"
+                "sha256:19241c1cbc971b9962473e4438a2ca19749a7dd002dd1a946eaba171b4114548",
+                "sha256:8e9dfa3cecb2400b3738a42c54c3043e821682b9c840b0448c0503f781130696"
             ],
             "index": "pypi",
-            "version": "==3.7.7"
+            "version": "==3.7.8"
         },
         "idna": {
             "hashes": [
@@ -137,10 +215,10 @@
         },
         "isort": {
             "hashes": [
-                "sha256:c40744b6bc5162bbb39c1257fe298b7a393861d50978b565f3ccd9cb9de0182a",
-                "sha256:f57abacd059dc3bd666258d1efb0377510a89777fda3e3274e3c01f7c03ae22d"
+                "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1",
+                "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"
             ],
-            "version": "==4.3.20"
+            "version": "==4.3.21"
         },
         "lazy-object-proxy": {
             "hashes": [
diff --git a/setup.py b/setup.py
index 279edc9..c2133b4 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-version = '0.0.14'
+version = '0.0.15'
 
 # When the project is installed by pip, this is the specification that is used to install its dependencies.
 install_requires = [