diff --git a/exporter/opentelemetry-exporter-opencensus/test-requirements.txt b/exporter/opentelemetry-exporter-opencensus/test-requirements.txt
index 8dfa89c30f6..19fb2cbfb73 100644
--- a/exporter/opentelemetry-exporter-opencensus/test-requirements.txt
+++ b/exporter/opentelemetry-exporter-opencensus/test-requirements.txt
@@ -4,7 +4,7 @@ iniconfig==2.3.1
 opencensus-proto==0.1.0
 packaging==24.0
 pluggy==1.6.0
-protobuf==3.20.3
+protobuf==5.29.6
 py-cpuinfo==9.0.0
 pytest==9.0.3
 tomli==2.0.1
diff --git a/exporter/opentelemetry-exporter-zipkin-proto-http/test-requirements.txt b/exporter/opentelemetry-exporter-zipkin-proto-http/test-requirements.txt
index 0c091225f67..25a8ea4be4a 100644
--- a/exporter/opentelemetry-exporter-zipkin-proto-http/test-requirements.txt
+++ b/exporter/opentelemetry-exporter-zipkin-proto-http/test-requirements.txt
@@ -5,7 +5,7 @@ idna==3.20
 iniconfig==2.3.1
 packaging==24.0
 pluggy==1.6.0
-protobuf==3.20.3
+protobuf==5.29.6
 py-cpuinfo==9.0.0
 pytest==9.0.3
 requests==2.33.0
diff --git a/shim/opentelemetry-opencensus-shim/test-requirements.txt b/shim/opentelemetry-opencensus-shim/test-requirements.txt
index c35ac005e28..a9d3e34dac4 100644
--- a/shim/opentelemetry-opencensus-shim/test-requirements.txt
+++ b/shim/opentelemetry-opencensus-shim/test-requirements.txt
@@ -13,7 +13,7 @@ opencensus-context==0.1.3
 opencensus-proto==0.1.0
 packaging==24.0
 pluggy==1.6.0
-protobuf==3.20.3
+protobuf==5.29.6
 py-cpuinfo==9.0.0
 pyasn1==0.6.4
 pyasn1-modules==0.4.2