diff --git a/pyproject.toml b/pyproject.toml
index f75673cb6..f2469aa70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -111,7 +111,8 @@ tavus=[]
 together = []
 tracing = [ "opentelemetry-sdk>=1.33.0", "opentelemetry-api>=1.33.0", "opentelemetry-instrumentation>=0.54b0" ]
 ultravox = [ "pipecat-ai[websockets-base]" ]
-webrtc = [ "aiortc>=1.13.0,<2", "opencv-python>=4.11.0.86,<5" ]
+# av not allowed to be 16.1.0 because Python >3.12 wheels missing from that version (see https://github.com/PyAV-Org/PyAV/actions/runs/20863131608/job/59951744895)
+webrtc = [ "aiortc>=1.13.0,<2", "opencv-python>=4.11.0.86,<5", "av!=16.1.0" ]
 websocket = [ "pipecat-ai[websockets-base]", "fastapi>=0.115.6,<0.122.0" ]
 websockets-base = [ "websockets>=13.1,<16.0" ]
 whisper = [ "faster-whisper~=1.1.1" ]