diff --git a/Pipfile b/Pipfile
index d86755a..0d540b5 100644
--- a/Pipfile
+++ b/Pipfile
@@ -32,7 +32,7 @@ sympy = "==1.4"
 toml = "==0.10.0"
 typed-ast = "==1.4.0"
 typing-extensions = "==3.7.4"
-urllib3 = "==1.25.3"
+urllib3 = "==1.25.8"
 wrapt = "==1.11.2"
 yapf = "==0.28.0"
 mypy_extensions = "==0.4.1"
diff --git a/Pipfile.lock b/Pipfile.lock
index 5e7d56e..fbb939f 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "c829296e1c8a4904c832c0513ce73f3b1a6a4abf85c132256e30f4521ee0a0c0"
+            "sha256": "69332e27aa7b716ee402070eaa9cc48eb54bd8860d3fef33a7dc1e24badfd54d"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -281,20 +281,25 @@
         },
         "typed-ast": {
             "hashes": [
+                "sha256:1170afa46a3799e18b4c977777ce137bb53c7485379d9706af8a59f2ea1aa161",
                 "sha256:18511a0b3e7922276346bcb47e2ef9f38fb90fd31cb9223eed42c85d1312344e",
                 "sha256:262c247a82d005e43b5b7f69aff746370538e176131c32dda9cb0f324d27141e",
                 "sha256:2b907eb046d049bcd9892e3076c7a6456c93a25bebfe554e931620c90e6a25b0",
                 "sha256:354c16e5babd09f5cb0ee000d54cfa38401d8b8891eefa878ac772f827181a3c",
+                "sha256:48e5b1e71f25cfdef98b013263a88d7145879fbb2d5185f2a0c79fa7ebbeae47",
                 "sha256:4e0b70c6fc4d010f8107726af5fd37921b666f5b31d9331f0bd24ad9a088e631",
                 "sha256:630968c5cdee51a11c05a30453f8cd65e0cc1d2ad0d9192819df9978984529f4",
                 "sha256:66480f95b8167c9c5c5c87f32cf437d585937970f3fc24386f313a4c97b44e34",
                 "sha256:71211d26ffd12d63a83e079ff258ac9d56a1376a25bc80b1cdcdf601b855b90b",
+                "sha256:7954560051331d003b4e2b3eb822d9dd2e376fa4f6d98fee32f452f52dd6ebb2",
+                "sha256:838997f4310012cf2e1ad3803bce2f3402e9ffb71ded61b5ee22617b3a7f6b6e",
                 "sha256:95bd11af7eafc16e829af2d3df510cecfd4387f6453355188342c3e79a2ec87a",
                 "sha256:bc6c7d3fa1325a0c6613512a093bc2a2a15aeec350451cbdf9e1d4bffe3e3233",
                 "sha256:cc34a6f5b426748a507dd5d1de4c1978f2eb5626d51326e43280941206c209e1",
                 "sha256:d755f03c1e4a51e9b24d899561fec4ccaf51f210d52abdf8c07ee2849b212a36",
                 "sha256:d7c45933b1bdfaf9f36c579671fec15d25b06c8398f113dab64c18ed1adda01d",
                 "sha256:d896919306dd0aa22d0132f62a1b78d11aaf4c9fc5b3410d3c666b818191630a",
+                "sha256:fdc1c9bbf79510b76408840e009ed65958feba92a88833cdceecff93ae8fff66",
                 "sha256:ffde2fbfad571af120fcbfbbc61c72469e72f550d676c3342492a9dfdefb8f12"
             ],
             "index": "pypi",
@@ -311,11 +316,11 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1",
-                "sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232"
+                "sha256:2f3db8b19923a873b3e5256dc9c2dedfa883e33d87c690d9c7913e1f40673cdc",
+                "sha256:87716c2d2a7121198ebcb7ce7cccf6ce5e9ba539041cfbaeecfb641dc0bf6acc"
             ],
             "index": "pypi",
-            "version": "==1.25.3"
+            "version": "==1.25.8"
         },
         "wrapt": {
             "hashes": [
@@ -398,20 +403,25 @@
         },
         "typed-ast": {
             "hashes": [
+                "sha256:1170afa46a3799e18b4c977777ce137bb53c7485379d9706af8a59f2ea1aa161",
                 "sha256:18511a0b3e7922276346bcb47e2ef9f38fb90fd31cb9223eed42c85d1312344e",
                 "sha256:262c247a82d005e43b5b7f69aff746370538e176131c32dda9cb0f324d27141e",
                 "sha256:2b907eb046d049bcd9892e3076c7a6456c93a25bebfe554e931620c90e6a25b0",
                 "sha256:354c16e5babd09f5cb0ee000d54cfa38401d8b8891eefa878ac772f827181a3c",
+                "sha256:48e5b1e71f25cfdef98b013263a88d7145879fbb2d5185f2a0c79fa7ebbeae47",
                 "sha256:4e0b70c6fc4d010f8107726af5fd37921b666f5b31d9331f0bd24ad9a088e631",
                 "sha256:630968c5cdee51a11c05a30453f8cd65e0cc1d2ad0d9192819df9978984529f4",
                 "sha256:66480f95b8167c9c5c5c87f32cf437d585937970f3fc24386f313a4c97b44e34",
                 "sha256:71211d26ffd12d63a83e079ff258ac9d56a1376a25bc80b1cdcdf601b855b90b",
+                "sha256:7954560051331d003b4e2b3eb822d9dd2e376fa4f6d98fee32f452f52dd6ebb2",
+                "sha256:838997f4310012cf2e1ad3803bce2f3402e9ffb71ded61b5ee22617b3a7f6b6e",
                 "sha256:95bd11af7eafc16e829af2d3df510cecfd4387f6453355188342c3e79a2ec87a",
                 "sha256:bc6c7d3fa1325a0c6613512a093bc2a2a15aeec350451cbdf9e1d4bffe3e3233",
                 "sha256:cc34a6f5b426748a507dd5d1de4c1978f2eb5626d51326e43280941206c209e1",
                 "sha256:d755f03c1e4a51e9b24d899561fec4ccaf51f210d52abdf8c07ee2849b212a36",
                 "sha256:d7c45933b1bdfaf9f36c579671fec15d25b06c8398f113dab64c18ed1adda01d",
                 "sha256:d896919306dd0aa22d0132f62a1b78d11aaf4c9fc5b3410d3c666b818191630a",
+                "sha256:fdc1c9bbf79510b76408840e009ed65958feba92a88833cdceecff93ae8fff66",
                 "sha256:ffde2fbfad571af120fcbfbbc61c72469e72f550d676c3342492a9dfdefb8f12"
             ],
             "index": "pypi",
diff --git a/requirements.txt b/requirements.txt
index 8a6ab85..fdaea70 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,11 @@
+-i https://pypi.org/simple/
 appdirs==1.4.3
 astroid==2.2.5
 attrs==19.1.0
 black==19.3b0
 certifi==2019.6.16
 chardet==3.0.4
-Click==7.0
+click==7.0
 codecov==2.0.15
 coverage==4.5.3
 ecdsa==0.13.2
@@ -13,8 +14,8 @@ isort==4.3.21
 lazy-object-proxy==1.4.1
 mccabe==0.6.1
 mpmath==1.1.0
-mypy==0.720
 mypy-extensions==0.4.1
+mypy==0.720
 pycryptodome==3.8.2
 pylint==2.3.1
 requests==2.22.0
@@ -23,6 +24,6 @@ sympy==1.4
 toml==0.10.0
 typed-ast==1.4.0
 typing-extensions==3.7.4
-urllib3==1.25.3
+urllib3==1.25.8
 wrapt==1.11.2
 yapf==0.28.0