diff --git a/dev_requirements.txt b/dev_requirements.txt
index 8285b0456f..8ffb1e944f 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -15,4 +15,5 @@ pytest-cov>=4.0.0
 vulture>=2.3.0
 ujson>=4.2.0
 wheel>=0.30.0
+urllib3<2
 uvloop
diff --git a/redis/parsers/resp3.py b/redis/parsers/resp3.py
index 5cd7f388dd..a04f054e24 100644
--- a/redis/parsers/resp3.py
+++ b/redis/parsers/resp3.py
@@ -92,14 +92,15 @@ def _read_response(self, disable_decoding=False, push_request=False):
                 pass
         # map response
         elif byte == b"%":
-            response = {
-                self._read_response(
-                    disable_decoding=disable_decoding
-                ): self._read_response(
+            # we use this approach and not dict comprehension here
+            # because this dict comprehension fails in python 3.7
+            resp_dict = {}
+            for _ in range(int(response)):
+                key = self._read_response(disable_decoding=disable_decoding)
+                resp_dict[key] = self._read_response(
                     disable_decoding=disable_decoding, push_request=push_request
                 )
-                for _ in range(int(response))
-            }
+            response = resp_dict
         # push response
         elif byte == b">":
             response = [