diff --git a/Pipfile.lock b/Pipfile.lock
index 9a8c24d..e6c4e4c 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -18,10 +18,10 @@
     "default": {
         "cachetools": {
             "hashes": [
-                "sha256:219b7dc6024195b6f2bc3d3f884d1fef458745cd323b04165378622dcc823852",
-                "sha256:9efcc9fab3b49ab833475702b55edd5ae07af1af7a4c627678980b45e459c460"
+                "sha256:1d057645db16ca7fe1f3bd953558897603d6f0b9c51ed9d11eb4d071ec4e2aab",
+                "sha256:de5d88f87781602201cde465d3afe837546663b168e8b39df67411b0bf10cefc"
             ],
-            "version": "==3.1.0"
+            "version": "==4.1.0"
         },
         "google-api-python-client": {
             "hashes": [
@@ -48,23 +48,25 @@
         },
         "httplib2": {
             "hashes": [
-                "sha256:4ba6b8fd77d0038769bf3c33c9a96a6f752bc4cdf739701fdcaf210121f399d4"
+                "sha256:4f6988e6399a2546b525a037d56da34aed4d149bbdc0e78523018d5606c26e74",
+                "sha256:b0e1f3ed76c97380fe2485bc47f25235453b40ef33ca5921bb2897e257a49c4c"
             ],
-            "version": "==0.12.1"
+            "index": "pypi",
+            "version": "==0.18.0"
         },
         "pyasn1": {
             "hashes": [
-                "sha256:da2420fe13a9452d8ae97a0e478adde1dee153b11ba832a95b223a2ba01c10f7",
-                "sha256:da6b43a8c9ae93bc80e2739efb38cc776ba74a886e3e9318d65fe81a8b8a2c6e"
+                "sha256:39c7e2ec30515947ff4e87fb6f456dfc6e84857d34be479c9d4a4ba4bf46aa5d",
+                "sha256:aef77c9fb94a3ac588e87841208bdec464471d9871bd5050a287cc9a475cd0ba"
             ],
-            "version": "==0.4.5"
+            "version": "==0.4.8"
         },
         "pyasn1-modules": {
             "hashes": [
-                "sha256:79580acf813e3b7d6e69783884e6e83ac94bf4617b36a135b85c599d8a818a7b",
-                "sha256:a52090e8c5841ebbf08ae455146792d9ef3e8445b21055d3a3b7ed9c712b7c7c"
+                "sha256:905f84c712230b2c592c19470d3ca8d552de726050d1d1716282a1f6146be65e",
+                "sha256:a50b808ffeb97cb3601dd25981f6b016cbb3d31fbf57a8b8a87428e6158d0c74"
             ],
-            "version": "==0.2.4"
+            "version": "==0.2.8"
         },
         "rsa": {
             "hashes": [
@@ -75,18 +77,17 @@
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.12.0"
+            "version": "==1.14.0"
         },
         "uritemplate": {
             "hashes": [
-                "sha256:01c69f4fe8ed503b2951bef85d996a9d22434d2431584b5b107b2981ff416fbd",
-                "sha256:1b9c467a940ce9fb9f50df819e8ddd14696f89b9a8cc87ac77952ba416e0a8fd",
-                "sha256:c02643cebe23fc8adb5e6becffe201185bf06c40bda5c0b4028a93f1527d011d"
+                "sha256:07620c3f3f8eed1f12600845892b0e036a2420acf513c53f7de0abd911a5894f",
+                "sha256:5af8ad10cec94f215e3f48112de2022e1d5a37ed427fbd88652fa908f2ab7cae"
             ],
-            "version": "==3.0.0"
+            "version": "==3.0.1"
         }
     },
     "develop": {}
diff --git a/requirements.txt b/requirements.txt
index 0c125fa..8aea217 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,11 @@
--i https://pypi.org/simple
-cachetools==3.1.0
+-i https://pypi.org/simple/
+cachetools==4.1.0
 google-api-python-client==1.7.8
 google-auth-httplib2==0.0.3
 google-auth==1.6.3
-httplib2==0.12.1
-pyasn1-modules==0.2.4
-pyasn1==0.4.5
+httplib2==0.18.0
+pyasn1-modules==0.2.8
+pyasn1==0.4.8
 rsa==4.0
-six==1.12.0
-uritemplate==3.0.0
+six==1.14.0
+uritemplate==3.0.1