diff --git a/ci/gpu/build.sh b/ci/gpu/build.sh
index e646307cf6..e996eb201c 100755
--- a/ci/gpu/build.sh
+++ b/ci/gpu/build.sh
@@ -122,8 +122,8 @@ if [[ -z "$PROJECT_FLASH" || "$PROJECT_FLASH" == "0" ]]; then
 
     gpuci_logger "Install the main version of dask and distributed"
     set -x
-    pip install "git+https://github.com/dask/distributed.git@main" --upgrade --no-deps
-    pip install "git+https://github.com/dask/dask.git@main" --upgrade --no-deps
+    pip install "git+https://github.com/dask/distributed.git@2021.09.1" --upgrade --no-deps
+    pip install "git+https://github.com/dask/dask.git@2021.09.1" --upgrade --no-deps
     set +x
 
     gpuci_logger "Python pytest for cuml"
@@ -195,8 +195,8 @@ else
 
     gpuci_logger "Install the main version of dask and distributed"
     set -x
-    pip install "git+https://github.com/dask/distributed.git@main" --upgrade --no-deps
-    pip install "git+https://github.com/dask/dask.git@main" --upgrade --no-deps
+    pip install "git+https://github.com/dask/distributed.git@2021.09.1" --upgrade --no-deps
+    pip install "git+https://github.com/dask/dask.git@2021.09.1" --upgrade --no-deps
     set +x
 
     gpuci_logger "Building cuml"
diff --git a/conda/environments/cuml_dev_cuda11.0.yml b/conda/environments/cuml_dev_cuda11.0.yml
index 9fdecefa21..21457b507a 100644
--- a/conda/environments/cuml_dev_cuda11.0.yml
+++ b/conda/environments/cuml_dev_cuda11.0.yml
@@ -30,8 +30,8 @@ dependencies:
 - pip
 - pip:
     - sphinx_markdown_tables
-    - git+https://github.com/dask/dask.git@main
-    - git+https://github.com/dask/distributed.git@main
+    - git+https://github.com/dask/dask.git@2021.09.1
+    - git+https://github.com/dask/distributed.git@2021.09.1
 
 # rapids-build-env, notebook-env and doc-env are defined in
 # https://docs.rapids.ai/maintainers/depmgmt/
diff --git a/conda/environments/cuml_dev_cuda11.2.yml b/conda/environments/cuml_dev_cuda11.2.yml
index 7759958426..f2c5a99bf8 100644
--- a/conda/environments/cuml_dev_cuda11.2.yml
+++ b/conda/environments/cuml_dev_cuda11.2.yml
@@ -30,8 +30,8 @@ dependencies:
 - pip
 - pip:
     - sphinx_markdown_tables
-    - git+https://github.com/dask/dask.git@main
-    - git+https://github.com/dask/distributed.git@main
+    - git+https://github.com/dask/dask.git@2021.09.1
+    - git+https://github.com/dask/distributed.git@2021.09.1
 
 # rapids-build-env, notebook-env and doc-env are defined in
 # https://docs.rapids.ai/maintainers/depmgmt/
diff --git a/conda/environments/cuml_dev_cuda11.4.yml b/conda/environments/cuml_dev_cuda11.4.yml
index 57505c9e78..f07a24e0e4 100644
--- a/conda/environments/cuml_dev_cuda11.4.yml
+++ b/conda/environments/cuml_dev_cuda11.4.yml
@@ -30,8 +30,8 @@ dependencies:
 - pip
 - pip:
     - sphinx_markdown_tables
-    - git+https://github.com/dask/dask.git@main
-    - git+https://github.com/dask/distributed.git@main
+    - git+https://github.com/dask/dask.git@2021.09.1
+    - git+https://github.com/dask/distributed.git@2021.09.1
 
 # rapids-build-env, notebook-env and doc-env are defined in
 # https://docs.rapids.ai/maintainers/depmgmt/
diff --git a/conda/recipes/cuml/meta.yaml b/conda/recipes/cuml/meta.yaml
index 1eadec7d64..5e517cd5b6 100644
--- a/conda/recipes/cuml/meta.yaml
+++ b/conda/recipes/cuml/meta.yaml
@@ -46,8 +46,8 @@ requirements:
     - nccl>=2.9.9
     - ucx-py 0.22
     - ucx-proc=*=gpu
-    - dask>=2021.6.0
-    - distributed>=2021.6.0
+    - dask=2021.09.1
+    - distributed=2021.09.1
     - joblib >=0.11
     - {{ pin_compatible('cudatoolkit', max_pin='x.x') }}