diff --git a/client/__main__.py b/client/__main__.py
index d5d5d31e..45d9eb5b 100644
--- a/client/__main__.py
+++ b/client/__main__.py
@@ -21,22 +21,28 @@ def patch_requests():
     """
     config.create_config_directory()
     ca_certs_file = config.CERT_FILE
-    ca_certs_contents = requests.__loader__.get_data('requests/cacert.pem')
-
-    should_write_certs = True
-
-    if os.path.isfile(ca_certs_file):
-        with open(ca_certs_file, 'rb') as f:
-            existing_certs = f.read()
-            if existing_certs != ca_certs_contents:
-                should_write_certs = True
-                print("Updating local SSL certificates")
-            else:
-                should_write_certs = False
-
-    if should_write_certs:
-        with open(ca_certs_file, 'wb') as f:
-            f.write(ca_certs_contents)
+    ca_certs_contents = None
+    try:
+        ca_certs_contents = requests.__loader__.get_data('requests/cacert.pem')
+    except OSError:
+        # TODO(kavigupta) not sure why this is coming up???
+        pass
+
+    if ca_certs_contents is not None:
+        should_write_certs = True
+
+        if os.path.isfile(ca_certs_file):
+            with open(ca_certs_file, 'rb') as f:
+                existing_certs = f.read()
+                if existing_certs != ca_certs_contents:
+                    should_write_certs = True
+                    print("Updating local SSL certificates")
+                else:
+                    should_write_certs = False
+
+        if should_write_certs:
+            with open(ca_certs_file, 'wb') as f:
+                f.write(ca_certs_contents)
 
     os.environ['REQUESTS_CA_BUNDLE'] = ca_certs_file
 
diff --git a/client/utils/locking.py b/client/utils/locking.py
index 03d75909..1ef9575e 100644
--- a/client/utils/locking.py
+++ b/client/utils/locking.py
@@ -4,4 +4,4 @@
 
 def lock(key, text):
     """Locks the given text using the given key and returns the result"""
-    return hmac.new(key.encode('utf-8'), text.encode('utf-8')).hexdigest()
\ No newline at end of file
+    return hmac.new(key.encode('utf-8'), text.encode('utf-8'), digestmod='md5').hexdigest()
diff --git a/client/utils/storage.py b/client/utils/storage.py
index cc9c7052..92dd71ee 100644
--- a/client/utils/storage.py
+++ b/client/utils/storage.py
@@ -26,7 +26,7 @@ def set_foreign_function_type(func, restype, argtypes):
 SECURITY_KEY = 'uMWm4sviPK3LyPzgWYFn'.encode('utf-8')
 
 def mac(value):
-    mac = hmac.new(SECURITY_KEY)
+    mac = hmac.new(SECURITY_KEY, digestmod='md5')
     mac.update(repr(value).encode('utf-8'))
     return mac.hexdigest()
 
diff --git a/requirements.txt b/requirements.txt
index 89b05b92..6517762f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # Client
 requests[security]==2.20.0
-coverage==3.7.1
+coverage==4.5.4
 
 # Tests
 nose==1.3.3
diff --git a/setup.py b/setup.py
index 33807631..1eb98760 100644
--- a/setup.py
+++ b/setup.py
@@ -39,6 +39,6 @@
     ],
     install_requires=[
         'requests==2.12.4',
-        'coverage==3.7.1'
+        'coverage==4.5.4'
     ],
 )