diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3fb26aefd..0ff552ad3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,7 +104,7 @@ jobs:
             cxx_std: 17
             openimageio_ver: master
             python_ver: 3.9
-            pybind11_ver: v2.6.2
+            pybind11_ver: v2.7.0
             simd: avx2,f16c
             batched: b8_AVX2,b8_AVX512,b16_AVX512
             setenvs: USE_OPENVDB=0
@@ -180,7 +180,7 @@ jobs:
             openexr_ver: v2.4.3
             openimageio_ver: v2.4.13.0
             python_ver: 2.7
-            pybind11_ver: v2.6.2
+            pybind11_ver: v2.7.0
             simd: 0
             setenvs: export PUGIXML_VERSION=v1.8
                             CMAKE_VERSION=3.15.5
diff --git a/src/build-scripts/ci-startup.bash b/src/build-scripts/ci-startup.bash
index 407dc0db8..a3d7b7d64 100755
--- a/src/build-scripts/ci-startup.bash
+++ b/src/build-scripts/ci-startup.bash
@@ -47,6 +47,9 @@ export DYLD_LIBRARY_PATH=${LOCAL_DEPS_DIR}/dist/lib:$DYLD_LIBRARY_PATH
 
 export TESTSUITE_CLEANUP_ON_SUCCESS=${TESTSUITE_CLEANUP_ON_SUCCESS:=1}
 
+# For CI, default to building missing dependencies automatically
+export OpenImageIO_BUILD_MISSING_DEPS=${OpenImageIO_BUILD_MISSING_DEPS:=all}
+
 # Parallel builds
 if [[ `uname -s` == "Linux" ]] ; then
     echo "procs: " `nproc`