diff --git a/core/src/main/java/io/grpc/internal/AbstractServerImplBuilder.java b/core/src/main/java/io/grpc/internal/AbstractServerImplBuilder.java
index 12795baf8fa..44cb4ff1e5a 100644
--- a/core/src/main/java/io/grpc/internal/AbstractServerImplBuilder.java
+++ b/core/src/main/java/io/grpc/internal/AbstractServerImplBuilder.java
@@ -73,7 +73,7 @@ public List<ServerServiceDefinition> getServices() {
       DecompressorRegistry.getDefaultInstance();
   private static final CompressorRegistry DEFAULT_COMPRESSOR_REGISTRY =
       CompressorRegistry.getDefaultInstance();
-  private static final long DEFAULT_HANDSHAKE_TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(20);
+  private static final long DEFAULT_HANDSHAKE_TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(120);
 
   final InternalHandlerRegistry.Builder registryBuilder =
       new InternalHandlerRegistry.Builder();