diff --git a/Pipfile b/Pipfile
index 4a40aeb..b17282d 100644
--- a/Pipfile
+++ b/Pipfile
@@ -4,7 +4,7 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-pycryptodomex = "==3.12.0"
+pycryptodomex = "==3.19.1"
 
 [dev-packages]
 
diff --git a/Pipfile.lock b/Pipfile.lock
index 366704a..ddca97c 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "8197513ad93512c51b7468ba80b79a7a4d543c79d43c53b3cbe48d907bc9c3e4"
+            "sha256": "3d0cc73f2cf3d8722a8bf513e06cb79a03f32286003f18d7807a661751e932ba"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -18,39 +18,42 @@
     "default": {
         "pycryptodomex": {
             "hashes": [
-                "sha256:08c809e9f4be8d4f9948cf4d5ebc7431bbd9e1c0cd5ff478d0d5229f1bc4ad50",
-                "sha256:097095a7c24b9e7eec865417f620f78adf218162c03b68e4fde194bf87801a67",
-                "sha256:0981e8071d2ee457d842821438f833e362eed9a25a445d54ad7610b24293118f",
-                "sha256:1bd9d158afa33dca04748b23e7b9d4055f8c8015ace2e972a866519af02d5eed",
-                "sha256:1f6c370abf11546b1c9b70062918d601ac8fb7ff113554601b43175eed7480ef",
-                "sha256:2595b7be43b8b2da953ea3506a8d71c07fc9b479d5c118b0c44a5eca2a1664f6",
-                "sha256:2d173a5db4e306cd32558b1a3ceb45bd2ebeb6596525fd5945963798b3851e3d",
-                "sha256:33c06d6819a0204fac675d100f92aa472c704cd774a47171a5949c75c1040ed6",
-                "sha256:3559da56e1045ad567e69fcc74245073fe1943b07b137bfd1073c7a540a89df7",
-                "sha256:3bfa2936f8391bfaa17ed6a5c726e33acad56d7b47b8bf824b1908b16b140025",
-                "sha256:4361881388817f89aa819a553e987200a6eb664df995632b063997dd373a7cee",
-                "sha256:43af464dcac1ae53e6e14a0ae6f08373b538f3c49fb9e426423618571edfecff",
-                "sha256:44097663c62b3aa03b5b403b816dedafa592984e8c6857a061ade41f32a2666e",
-                "sha256:4cbaea8ab8bfa283e6219af39624d921f72f8174765a35416aab4d4b4dec370e",
-                "sha256:5b0fd9fc81d43cd54dc8e4b2df8730ffd1e34f1f0679920deae16f6487aa1414",
-                "sha256:676d9f4286f490612fa35ca8fe4b1fced8ff18e653abc1dda34fbf166129d6c2",
-                "sha256:79ad48096ceb5c714fbc4dc82e3e6b37f095f627b1fef90d94d85e19a19d6611",
-                "sha256:83379f1fd7b99c4993f5e905f2a6ddb9003996655151ea3c2ee77332ad009d08",
-                "sha256:88dc997e3e9199a0d67b547fba36c6d1c54fca7d83c4bfe0d3f34f55a4717a2c",
-                "sha256:8c5b97953130ff76500c6e8e159f2b881c737ebf00034006517b57f382d5317c",
-                "sha256:922e9dac0166e4617e5c7980d2cff6912a6eb5cb5c13e7ece222438650bd7f66",
-                "sha256:9c037aaf6affc8f7c4f6f9f6279aa57dd526734246fb5221a0fff3124f57e0b1",
-                "sha256:a896b41c518269c1cceb582e298a868e6c74bb3cbfd362865ea686c78aebe91d",
-                "sha256:b1a6f17c4ad896ed628663b021cd797b098c7e9537fd259958f6ffb3b8921081",
-                "sha256:b5ddaee74e1f06af9c0765a147904dddacf4ca9707f8f079e14e2b14b4f5a544",
-                "sha256:d55374ebc36de7a3217f2e2318886f0801dd5e486e21aba1fc4ca08e3b6637d7",
-                "sha256:ddac6a092b97aa11d2a21aec33e941b4453ef774da3d98f2b7c1e01da05e6d5e",
-                "sha256:de9832ac3c51484fe1757ca4303695423b16cfa54874dae9239bf41f50a2affa",
-                "sha256:e42a82c63952ed70be3c13782c6984a519b514e6b10108a9647c7576b6c86650",
-                "sha256:ea8e83bf4731a2369350d7771a1f2ef8d72ad3da70a37d86b1374be8c675abd0"
+                "sha256:011e859026ecbd15b8e720e8992361186e582cf726c50bde6ff8c0c05e820ddf",
+                "sha256:0b42e2743893f386dfb58fe24a4c8be5305c3d1c825d5f23d9e63fd0700d1110",
+                "sha256:0b7154aff2272962355f8941fd514104a88cb29db2d8f43a29af900d6398eb1c",
+                "sha256:0bc4b7bfaac56e6dfd62044847443a3d110c7abea7fcb0d68c1aea64ed3a6697",
+                "sha256:10c2eed4efdfa084b602ab922e699a0a2ba82053baebfc8afcaf27489def7955",
+                "sha256:1c04cfff163c05d033bf28e3c4429d8222796738c7b6c1638b9d7090b904611e",
+                "sha256:23707238b024b36c35dd3428f5af6c1f0c5ef54c21e387a2063633717699b8b2",
+                "sha256:371bbe0be17b4dd8cc0c2f378d75ea33f00d5a39884c09a672016ac40145a5fa",
+                "sha256:39eb1f82ac3ba3e39d866f38e480e8fa53fcdd22260340f05f54a8188d47d510",
+                "sha256:3f3c58971784fba0e014bc3f8aed1197b86719631e1b597d36d7354be5598312",
+                "sha256:5ca98de2e5ac100e57a7116309723360e8f799f722509e376dc396cdf65eec9c",
+                "sha256:62f51a63d73153482729904381dd2de86800b0733a8814ee8f072fa73e5c92fb",
+                "sha256:76414d39df6b45bcc4f38cf1ba2031e0f4b8e99d1ba3c2eee31ffe1b9f039733",
+                "sha256:8dffe067d5fff14dba4d18ff7d459cc2a47576d82dafbff13a8f1199c3353e41",
+                "sha256:96000b837bcd8e3bf86b419924a056c978e45027281e4318650c81c25a3ef6cc",
+                "sha256:9919a1edd2a83c4dfb69f1d8a4c0c5efde7147ef15b07775633372b80c90b5d8",
+                "sha256:aab7941c2ff53eb63cb26252770e4f14386d79ce07baeffbf98a1323c1646545",
+                "sha256:ac562e239d98cfef763866c0aee4586affb0d58c592202f06c87241af99db241",
+                "sha256:ae75eea2e908383fd4c659fdcfe9621a72869e3e3ee73904227e93b7f7b80b54",
+                "sha256:b5c336dc698650283ad06f8c0237a984087d0af9f403ff21d633507335628156",
+                "sha256:beb5f0664f49b6093da179ee8e27c1d670779f50b9ece0886ce491bb8bd63728",
+                "sha256:c1ae2fb8d5d6771670436dcc889b293e363c97647a6d31c21eebc12b7b760010",
+                "sha256:c9332b04bf3f838327087b028f690f4ddb9341eb014a0221e79b9c19a77f7555",
+                "sha256:c9cb88ed323be1aa642b3c17cd5caa1a03c3a8fbad092d48ecefe88e328ffae3",
+                "sha256:d45d0d35a238d838b872598fa865bbfb31aaef9aeeda77c68b04ef79f9a469dc",
+                "sha256:d7a77391fd351ff1bdf8475558ddc6e92950218cb905419ee14aa02f370f1054",
+                "sha256:de5a43901e47e7a6938490fc5de3074f6e35c8b481a75b227c0d24d6099bd41d",
+                "sha256:e94a7e986b117b72e9472f8eafdd81748dafff30815401f9760f759f1debe9ef",
+                "sha256:ed3bdda44cc05dd13eee697ab9bea6928531bb7b218e68e66d0d3eb2ebab043e",
+                "sha256:f24f49fc6bd706d87048654d6be6c7c967d6836d4879e3a7c439275fab9948ad",
+                "sha256:f8a97b1acd36e9ce9d4067d94a8be99c458f0eb8070828639302a95cfcf0770b",
+                "sha256:f8b3d9e7c17c1ffc1fa5b11c0bbab8a5df3de8596bb32ad30281b21e5ede4bf5"
             ],
             "index": "pypi",
-            "version": "==3.12.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==3.19.1"
         }
     },
     "develop": {}
diff --git a/requirements.txt b/requirements.txt
index 68122f4..86f5bef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
-pycryptodomex==3.12.0
+-i https://pypi.org/simple
+pycryptodomex==3.19.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'