diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05d10e3213..91c1ee379c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -564,6 +564,8 @@ jobs:
   bazel_test:
     name: Bazel
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -586,6 +588,8 @@ jobs:
   bazel_no_bzlmod_test:
     name: Bazel without bzlmod
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -608,6 +612,8 @@ jobs:
   bazel_test_async:
     name: Bazel with async export
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -630,6 +636,8 @@ jobs:
   bazel_valgrind:
     name: Bazel valgrind
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -652,6 +660,8 @@ jobs:
   bazel_noexcept:
     name: Bazel noexcept
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -674,6 +684,8 @@ jobs:
   bazel_nortti:
     name: Bazel nortti
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -696,6 +708,8 @@ jobs:
   bazel_asan:
     name: Bazel asan config
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -718,6 +732,8 @@ jobs:
   bazel_tsan:
     name: Bazel tsan config
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -740,6 +756,8 @@ jobs:
   bazel_osx:
     name: Bazel on MacOS
     runs-on: macos-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -757,6 +775,8 @@ jobs:
   benchmark:
     name: Benchmark
     runs-on: ubuntu-latest
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
@@ -856,6 +876,8 @@ jobs:
   windows_bazel:
     name: Bazel Windows
     runs-on: windows-2019
+    env:
+      CMAKE_POLICY_VERSION_MINIMUM: "3.5"
     steps:
     - uses: actions/checkout@v4
       with:
diff --git a/.github/workflows/iwyu.yml b/.github/workflows/iwyu.yml
index db19cd80f3..b4f710f690 100644
--- a/.github/workflows/iwyu.yml
+++ b/.github/workflows/iwyu.yml
@@ -50,6 +50,7 @@ jobs:
             -DWITH_OTLP_HTTP=ON \
             -DWITH_OTLP_FILE=ON \
             -DWITH_OPENTRACING=ON \
+            -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
             -DWITH_OTLP_HTTP_COMPRESSION=ON \
             -DWITH_THREAD_INSTRUMENTATION=ON \
             -DWITH_ZIPKIN=ON \
diff --git a/ci/do_ci.sh b/ci/do_ci.sh
index f81e96469d..8bf627eae3 100755
--- a/ci/do_ci.sh
+++ b/ci/do_ci.sh
@@ -238,6 +238,7 @@ elif [[ "$1" == "cmake.opentracing_shim.test" ]]; then
   cmake "${CMAKE_OPTIONS[@]}" \
         -DCMAKE_CXX_FLAGS="-Werror -Wno-error=redundant-move $CXXFLAGS" \
         -DWITH_OPENTRACING=ON \
+        -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
         "${SRC_DIR}"
   make -j $(nproc)
   make test
diff --git a/ci/install_abseil.sh b/ci/install_abseil.sh
index 04ac0e0037..8a261e5a19 100755
--- a/ci/install_abseil.sh
+++ b/ci/install_abseil.sh
@@ -16,6 +16,7 @@ git clone --depth=1 -b ${ABSEIL_CPP_VERSION} https://github.com/abseil/abseil-cp
 cd abseil-cpp
 ABSEIL_CPP_BUILD_OPTIONS=(
     "-DBUILD_TESTING=OFF"
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
     "-DCMAKE_POSITION_INDEPENDENT_CODE=ON"
     "-DCMAKE_INSTALL_PREFIX=$INSTALL_DIR"
 )
diff --git a/ci/setup_grpc.sh b/ci/setup_grpc.sh
index 056cc089d7..a6c022ddf3 100755
--- a/ci/setup_grpc.sh
+++ b/ci/setup_grpc.sh
@@ -107,6 +107,7 @@ if [[ $build_internal_abseil_cpp -ne 0 ]]; then
         -DCMAKE_CXX_STANDARD=${std_version}
         -DCMAKE_CXX_STANDARD_REQUIRED=ON
         -DCMAKE_CXX_EXTENSIONS=OFF
+        -DCMAKE_POLICY_VERSION_MINIMUM=3.5
         -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE
         -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR
     )
@@ -124,6 +125,7 @@ GRPC_BUILD_OPTIONS=(
     -DCMAKE_CXX_STANDARD=${std_version}
     -DCMAKE_CXX_STANDARD_REQUIRED=ON
     -DCMAKE_CXX_EXTENSIONS=OFF
+    -DCMAKE_POLICY_VERSION_MINIMUM=3.5
     -DgRPC_BUILD_TESTS=OFF
     -DgRPC_BUILD_GRPC_CPP_PLUGIN=ON
     -DgRPC_BUILD_GRPC_CSHARP_PLUGIN=OFF