diff --git a/aries-backchannels/acapy/Dockerfile.acapy b/aries-backchannels/acapy/Dockerfile.acapy
index 811a727a..432beef5 100644
--- a/aries-backchannels/acapy/Dockerfile.acapy
+++ b/aries-backchannels/acapy/Dockerfile.acapy
@@ -1,4 +1,4 @@
-FROM python:3.7-slim-bullseye
+FROM python:3.9-slim-bullseye
 
 RUN apt-get update \
    && apt-get install -y git gnupg2 software-properties-common curl \
diff --git a/aries-backchannels/acapy/Dockerfile.acapy-main b/aries-backchannels/acapy/Dockerfile.acapy-main
index dffa04c3..17550f42 100644
--- a/aries-backchannels/acapy/Dockerfile.acapy-main
+++ b/aries-backchannels/acapy/Dockerfile.acapy-main
@@ -1,4 +1,4 @@
-FROM python:3.7-slim-bullseye
+FROM python:3.9-slim-bullseye
 
 RUN apt-get update \
    && apt-get install -y git gnupg2 software-properties-common curl \
diff --git a/aries-backchannels/acapy/acapy_backchannel.py b/aries-backchannels/acapy/acapy_backchannel.py
index 8f4ecece..c70b1c21 100644
--- a/aries-backchannels/acapy/acapy_backchannel.py
+++ b/aries-backchannels/acapy/acapy_backchannel.py
@@ -2292,7 +2292,7 @@ async def main(start_port: int, show_timing: bool = False, interactive: bool = T
                     break
         else:
             print("Press Ctrl-C to exit ...")
-            remaining_tasks = asyncio.Task.all_tasks()
+            remaining_tasks = asyncio.all_tasks()
             await asyncio.gather(*remaining_tasks)
 
     finally:
diff --git a/aries-backchannels/mobile/mobile_backchannel.py b/aries-backchannels/mobile/mobile_backchannel.py
index 50f82b05..d31e1766 100644
--- a/aries-backchannels/mobile/mobile_backchannel.py
+++ b/aries-backchannels/mobile/mobile_backchannel.py
@@ -260,7 +260,7 @@ async def main(start_port: int, show_timing: bool = False, interactive: bool = T
                     break
         else:
             print("Press Ctrl-C to exit ...")
-            remaining_tasks = asyncio.Task.all_tasks()
+            remaining_tasks = asyncio.all_tasks()
             await asyncio.gather(*remaining_tasks)
 
     finally: