diff --git a/CHANGES b/CHANGES
index b289b52f5f..e69b0d5e25 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,10 @@
 
+3.3.0-dev.512 | 2020-11-10 13:55:33 -0700
+
+  * Change Debian 10 CI config to use GCC (Jon Siwek, Corelight)
+
+  * Update external testing repo hashes for canonification updates (Tim Wojtulewicz, Corelight)
+
 3.3.0-dev.509 | 2020-11-10 08:41:54 -0700
 
   * GH-1221: Add unknown_protocols.log for logging packet analyzer lookup failures (Tim Wojtulewicz, Corelight)
diff --git a/VERSION b/VERSION
index 5f2e92dac8..a399488b3e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.3.0-dev.509
+3.3.0-dev.512
diff --git a/ci/debian-10/Dockerfile b/ci/debian-10/Dockerfile
index 2a9d29d259..ea5a9ab0b3 100644
--- a/ci/debian-10/Dockerfile
+++ b/ci/debian-10/Dockerfile
@@ -23,14 +23,8 @@ RUN apt-get update && apt-get -y install \
     curl \
     wget \
     xz-utils \
-    clang \
-    libc++-7-dev \
-    libc++abi-7-dev \
   && rm -rf /var/lib/apt/lists/*
 
-RUN update-alternatives --install /usr/bin/cc cc /usr/bin/clang 100
-RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++ 100
-
 # Many distros adhere to PEP 394's recommendation for `python` = `python2` so
 # this is a simple workaround until we drop Python 2 support and explicitly
 # use `python3` for all invocations (e.g. in shebangs).
@@ -38,5 +32,3 @@ RUN ln -sf /usr/bin/python3 /usr/local/bin/python
 RUN ln -sf /usr/bin/pip3 /usr/local/bin/pip
 
 RUN pip install junit2html
-
-ENV CXXFLAGS=-stdlib=libc++