diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index 4c31a1431..540d98744 100644
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -559,7 +559,7 @@ class SecurityGroup(object):
 
             return attr
 
-        for key, value in filters.iteritems():
+        for key, value in filters.items():
             ret = False
 
             if key.startswith('ip-permission'):
diff --git a/moto/ec2/responses/security_groups.py b/moto/ec2/responses/security_groups.py
index a12caec41..37d9bf35d 100644
--- a/moto/ec2/responses/security_groups.py
+++ b/moto/ec2/responses/security_groups.py
@@ -38,7 +38,7 @@ def process_rules_from_querystring(querystring):
 
 def process_group_ids_from_querystring(querystring):
     group_ids = []
-    for key, value in querystring.iteritems():
+    for key, value in querystring.items():
         if 'GroupId' in key:
             group_ids.append(value[0])
     return group_ids
@@ -46,7 +46,7 @@ def process_group_ids_from_querystring(querystring):
 
 def process_groupnames_from_querystring(querystring):
     groupnames = []
-    for key, value in querystring.iteritems():
+    for key, value in querystring.items():
         if 'GroupName' in key:
             groupnames.append(value[0])
     return groupnames
diff --git a/moto/iam/utils.py b/moto/iam/utils.py
index 671de8f47..db3835210 100644
--- a/moto/iam/utils.py
+++ b/moto/iam/utils.py
@@ -5,7 +5,7 @@ import six
 
 
 def random_alhpnumeric(length):
-    return ''.join(unicode(
+    return ''.join(six.text_type(
         random.choice(
             string.ascii_letters + string.digits
         )) for _ in range(length)
@@ -20,7 +20,7 @@ def random_resource_id():
 
 
 def random_access_key():
-    return ''.join(unicode(
+    return ''.join(six.text_type(
         random.choice(
             string.ascii_uppercase + string.digits
         )) for _ in range(16)