diff --git a/benchmarks/map-reduce/requirements/common_s3.txt b/benchmarks/map-reduce/requirements/common_s3.txt
index c0ec6d87..2f4a239b 100644
--- a/benchmarks/map-reduce/requirements/common_s3.txt
+++ b/benchmarks/map-reduce/requirements/common_s3.txt
@@ -1,5 +1,5 @@
-grpcio==1.38.1
-grpcio-reflection==1.38.1
+grpcio==1.66.1
+grpcio-reflection==1.66.1
 opentelemetry-api==1.3.0
 opentelemetry-exporter-zipkin==1.3.0
 opentelemetry-exporter-zipkin-json==1.3.0
@@ -9,6 +9,6 @@ opentelemetry-instrumentation-grpc==0.22b0
 opentelemetry-sdk==1.3.0
 opentelemetry-semantic-conventions==0.22b0
 boto3==1.18.1
-grpcio-tools==1.38.1
+grpcio-tools==1.66.1
 joblib==1.2.0
 environs==9.3.2
diff --git a/benchmarks/stacking-training/requirements.txt b/benchmarks/stacking-training/requirements.txt
index 39f0c2d7..b72144ec 100644
--- a/benchmarks/stacking-training/requirements.txt
+++ b/benchmarks/stacking-training/requirements.txt
@@ -1,5 +1,5 @@
-grpcio==1.38.1
-grpcio-reflection==1.38.1
+grpcio==1.66.1
+grpcio-reflection==1.66.1
 opentelemetry-api==1.3.0
 opentelemetry-exporter-zipkin==1.3.0
 opentelemetry-exporter-zipkin-json==1.3.0
@@ -10,7 +10,7 @@ opentelemetry-sdk==1.3.0
 opentelemetry-semantic-conventions==0.22b0
 boto3==1.18.1
 redis==3.5.3
-grpcio-tools==1.38.1
+grpcio-tools==1.66.1
 environs==9.3.2
 scikit-learn==0.24.2
 numpy==1.21.0
diff --git a/benchmarks/tuning-halving/requirements.txt b/benchmarks/tuning-halving/requirements.txt
index 6cc5ad63..91ad1a2c 100644
--- a/benchmarks/tuning-halving/requirements.txt
+++ b/benchmarks/tuning-halving/requirements.txt
@@ -1,5 +1,5 @@
-grpcio==1.38.1
-grpcio-reflection==1.38.1
+grpcio==1.66.1
+grpcio-reflection==1.66.1
 opentelemetry-api==1.3.0
 opentelemetry-exporter-zipkin==1.3.0
 opentelemetry-exporter-zipkin-json==1.3.0
@@ -10,7 +10,7 @@ opentelemetry-sdk==1.3.0
 opentelemetry-semantic-conventions==0.22b0
 boto3==1.18.1
 redis==3.5.3
-grpcio-tools==1.38.1
+grpcio-tools==1.66.1
 environs==9.3.2
 scikit-learn==0.24.2
 numpy==1.20.1
diff --git a/benchmarks/video-analytics/requirements.txt b/benchmarks/video-analytics/requirements.txt
index d78d3672..db2df7fc 100644
--- a/benchmarks/video-analytics/requirements.txt
+++ b/benchmarks/video-analytics/requirements.txt
@@ -1,4 +1,4 @@
-grpcio==1.38.1
+grpcio==1.66.1
 opentelemetry-api==1.3.0
 opentelemetry-exporter-zipkin==1.3.0
 opentelemetry-exporter-zipkin-json==1.3.0
@@ -9,6 +9,6 @@ opentelemetry-sdk==1.3.0
 opentelemetry-semantic-conventions==0.22b0
 boto3==1.18.1
 redis==3.5.3
-grpcio-tools==1.38.1
+grpcio-tools==1.66.1
 environs==9.3.2
 pycapnp==1.3.0