diff --git a/Dockerfile b/Dockerfile
index 8335bbcd3..2ac356b42 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,7 +38,7 @@ ENV PATH="/root/.pyenv/bin:/root/.pyenv/shims:${PATH}"
 RUN pyenv install 3.11.4 && \
     pyenv global 3.11.4 && \
     pyenv rehash && \
-    pip3 install --no-cache-dir pyyaml Cython scons pycapnp==1.1.0 pre-commit pylint parameterized coverage numpy
+    pip3 install --no-cache-dir pyyaml Cython scons pycapnp pre-commit pylint parameterized coverage numpy
 
 WORKDIR /project/
 RUN cd /tmp/ && \
diff --git a/messaging/__init__.py b/messaging/__init__.py
index d92a2a171..5a863f130 100644
--- a/messaging/__init__.py
+++ b/messaging/__init__.py
@@ -43,7 +43,8 @@ def fake_event_handle(endpoint: str, identifier: Optional[str] = None, override:
 
 
 def log_from_bytes(dat: bytes) -> capnp.lib.capnp._DynamicStructReader:
-  return log.Event.from_bytes(dat, traversal_limit_in_words=NO_TRAVERSAL_LIMIT)
+  with log.Event.from_bytes(dat, traversal_limit_in_words=NO_TRAVERSAL_LIMIT) as msg:
+    return msg
 
 
 def new_message(service: Optional[str] = None, size: Optional[int] = None) -> capnp.lib.capnp._DynamicStructBuilder: