diff --git a/conda/environments/all_cuda-118_arch-x86_64.yaml b/conda/environments/all_cuda-118_arch-x86_64.yaml
index 7290f6c7e0..f965809e50 100644
--- a/conda/environments/all_cuda-118_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-118_arch-x86_64.yaml
@@ -17,7 +17,7 @@ dependencies:
 - cython>=3.0.0
 - dask>=2022.05.2
 - distributed>=2022.05.2
-- doxygen=1.8.20
+- doxygen=1.9.1
 - gcc_linux-64=11.*
 - libcufile-dev=1.4.0.31
 - libcufile=1.4.0.31
diff --git a/conda/environments/all_cuda-120_arch-x86_64.yaml b/conda/environments/all_cuda-120_arch-x86_64.yaml
index d569171f77..12caededb4 100644
--- a/conda/environments/all_cuda-120_arch-x86_64.yaml
+++ b/conda/environments/all_cuda-120_arch-x86_64.yaml
@@ -17,7 +17,7 @@ dependencies:
 - cython>=3.0.0
 - dask>=2022.05.2
 - distributed>=2022.05.2
-- doxygen=1.8.20
+- doxygen=1.9.1
 - gcc_linux-64=11.*
 - libcufile
 - libcufile-dev
diff --git a/dependencies.yaml b/dependencies.yaml
index 0c5aab1b17..c90408f79e 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -240,7 +240,7 @@ dependencies:
           - sphinx
       - output_types: conda
         packages:
-          - doxygen=1.8.20 # pre-commit hook needs a specific version.
+          - doxygen=1.9.1 # pre-commit hook needs a specific version.
   py_version:
     specific:
       - output_types: conda