diff --git a/pubnub/request_handlers/async_aiohttp.py b/pubnub/request_handlers/async_aiohttp.py
index a67605c2..e727e323 100644
--- a/pubnub/request_handlers/async_aiohttp.py
+++ b/pubnub/request_handlers/async_aiohttp.py
@@ -141,7 +141,8 @@ async def async_request(self, options_func, cancellation_event):
                 uuid=uuid,
                 auth_key=auth_key,
                 client_request=None,
-                client_response=response
+                client_response=response,
+                http_version=f"HTTP/{response.version.major}.{response.version.minor}" if response.version else None
             )
 
         # if body is not None and len(body) > 0 and not options.non_json_response:
@@ -173,6 +174,10 @@ async def async_request(self, options_func, cancellation_event):
             data = "N/A"
 
         logger.debug(data)
+        logger.debug(
+            "PubNub request completed: operation=%s protocol=%s"
+            % (options.operation_type, response_info.http_version)
+        )
 
         if response.status not in (200, 307, 204):
 
diff --git a/pubnub/request_handlers/async_httpx.py b/pubnub/request_handlers/async_httpx.py
index 002d6df1..fc23d65f 100644
--- a/pubnub/request_handlers/async_httpx.py
+++ b/pubnub/request_handlers/async_httpx.py
@@ -193,7 +193,8 @@ async def async_request(self, options_func, cancellation_event):
                 uuid=uuid,
                 auth_key=auth_key,
                 client_request=None,
-                client_response=response
+                client_response=response,
+                http_version=response.http_version
             )
 
         # if body is not None and len(body) > 0 and not options.non_json_response:
@@ -225,6 +226,10 @@ async def async_request(self, options_func, cancellation_event):
             data = "N/A"
 
         logger.debug(data)
+        logger.debug(
+            "PubNub request completed: operation=%s protocol=%s"
+            % (options.operation_type, response_info.http_version)
+        )
 
         if response.status_code not in (200, 307, 204):
 
diff --git a/pubnub/request_handlers/httpx.py b/pubnub/request_handlers/httpx.py
index d22e0ee2..01db83f0 100644
--- a/pubnub/request_handlers/httpx.py
+++ b/pubnub/request_handlers/httpx.py
@@ -318,7 +318,8 @@ def _build_envelope(self, p_options, e_options):
                 origin=res.url.host,
                 uuid=uuid,
                 auth_key=auth_key,
-                client_request=res.request
+                client_request=res.request,
+                http_version=res.http_version
             )
 
         if res.status_code not in [200, 204, 307]:
@@ -433,6 +434,11 @@ def _invoke_request(self, p_options, e_options, base_origin):
 
         try:
             res = session.request(**args)
+            logger.debug(
+                "PubNub request completed: operation=%s protocol=%s"
+                % (e_options.operation_type, res.http_version)
+            )
+
             # Safely access response text - read content first for streaming responses
             try:
                 logger.debug("GOT %s" % res.text)
diff --git a/pubnub/request_handlers/requests.py b/pubnub/request_handlers/requests.py
index 14de1448..19df14b9 100644
--- a/pubnub/request_handlers/requests.py
+++ b/pubnub/request_handlers/requests.py
@@ -174,7 +174,11 @@ def _build_envelope(self, p_options, e_options):
                 origin=url.hostname,
                 uuid=uuid,
                 auth_key=auth_key,
-                client_request=res.request
+                client_request=res.request,
+                http_version=(
+                    f"HTTP/{res.raw.version // 10}.{res.raw.version % 10}"
+                    if res.raw and res.raw.version else None
+                )
             )
 
         if not res.ok:
@@ -269,6 +273,16 @@ def _invoke_request(self, p_options, e_options, base_origin):
         try:
             res = self.session.request(**args)
             logger.debug("GOT %s" % res.text)
+
+            http_ver = (
+                f"HTTP/{res.raw.version // 10}.{res.raw.version % 10}"
+                if res.raw and res.raw.version else "unknown"
+            )
+            logger.debug(
+                "PubNub request completed: operation=%s protocol=%s"
+                % (e_options.operation_type, http_ver)
+            )
+
         except requests.exceptions.ConnectionError as e:
             raise PubNubException(
                 pn_error=PNERR_CONNECTION_ERROR,
diff --git a/pubnub/structures.py b/pubnub/structures.py
index a7ca2bb9..af7575c3 100644
--- a/pubnub/structures.py
+++ b/pubnub/structures.py
@@ -80,7 +80,8 @@ def __init__(self, headers, pn_config):
 
 
 class ResponseInfo(object):
-    def __init__(self, status_code, tls_enabled, origin, uuid, auth_key, client_request, client_response=None):
+    def __init__(self, status_code, tls_enabled, origin, uuid, auth_key, client_request,
+                 client_response=None, http_version=None):
         self.status_code = status_code
         self.tls_enabled = tls_enabled
         self.origin = origin
@@ -88,6 +89,7 @@ def __init__(self, status_code, tls_enabled, origin, uuid, auth_key, client_requ
         self.auth_key = auth_key
         self.client_request = client_request
         self.client_response = client_response
+        self.http_version = http_version
 
 
 class Envelope(object):