diff --git a/.ci_support/linux_64_.yaml b/.ci_support/linux_64_.yaml
index b8c4b7f..be77558 100644
--- a/.ci_support/linux_64_.yaml
+++ b/.ci_support/linux_64_.yaml
@@ -15,7 +15,7 @@ channel_targets:
 docker_image:
 - quay.io/condaforge/linux-anvil-cos7-x86_64
 libprotobuf:
-- 4.25.3
+- 5.27.5
 rust_compiler:
 - rust
 rust_compiler_version:
diff --git a/.ci_support/osx_64_.yaml b/.ci_support/osx_64_.yaml
index 860a90e..a0274c7 100644
--- a/.ci_support/osx_64_.yaml
+++ b/.ci_support/osx_64_.yaml
@@ -15,7 +15,7 @@ channel_sources:
 channel_targets:
 - conda-forge main
 libprotobuf:
-- 4.25.3
+- 5.27.5
 macos_machine:
 - x86_64-apple-darwin13.4.0
 rust_compiler:
diff --git a/.ci_support/win_64_.yaml b/.ci_support/win_64_.yaml
index a7fe185..a151bea 100644
--- a/.ci_support/win_64_.yaml
+++ b/.ci_support/win_64_.yaml
@@ -7,7 +7,7 @@ channel_sources:
 channel_targets:
 - conda-forge main
 libprotobuf:
-- 4.25.3
+- 5.27.5
 rust_compiler:
 - rust
 rust_compiler_version: