diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45ea736..cd28d20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.2.3-wip
+
+* Add const constructor to `GrpcError` fixing #606.
+
 ## 3.2.2
 
 * Remove `base` qualifier on `ResponseStream`.
diff --git a/lib/src/shared/status.dart b/lib/src/shared/status.dart
index 597afce..5ab3a05 100644
--- a/lib/src/shared/status.dart
+++ b/lib/src/shared/status.dart
@@ -151,7 +151,7 @@ class StatusCode {
   }
 }
 
-class GrpcError implements Exception {
+final class GrpcError implements Exception {
   final int code;
   final String? message;
   final Object? rawResponse;
@@ -159,16 +159,16 @@ class GrpcError implements Exception {
   final List<GeneratedMessage>? details;
 
   /// Custom error code.
-  GrpcError.custom(this.code,
+  const GrpcError.custom(this.code,
       [this.message, this.details, this.rawResponse, this.trailers = const {}]);
 
   /// The operation completed successfully.
-  GrpcError.ok([this.message, this.details, this.rawResponse])
+  const GrpcError.ok([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.ok;
 
   /// The operation was cancelled (typically by the caller).
-  GrpcError.cancelled([this.message, this.details, this.rawResponse])
+  const GrpcError.cancelled([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.cancelled;
 
@@ -176,7 +176,7 @@ class GrpcError implements Exception {
   /// Status value received from another address space belongs to an error-space
   /// that is not known in this address space. Also errors raised by APIs that
   /// do not return enough error information may be converted to this error.
-  GrpcError.unknown([this.message, this.details, this.rawResponse])
+  const GrpcError.unknown([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.unknown;
 
@@ -184,7 +184,8 @@ class GrpcError implements Exception {
   /// [failedPrecondition]. [invalidArgument] indicates arguments that are
   /// problematic regardless of the state of the system (e.g., a malformed file
   /// name).
-  GrpcError.invalidArgument([this.message, this.details, this.rawResponse])
+  const GrpcError.invalidArgument(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.invalidArgument;
 
@@ -193,18 +194,19 @@ class GrpcError implements Exception {
   /// operation has completed successfully. For example, a successful response
   /// from a server could have been delayed long enough for the deadline to
   /// expire.
-  GrpcError.deadlineExceeded([this.message, this.details, this.rawResponse])
+  const GrpcError.deadlineExceeded(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.deadlineExceeded;
 
   /// Some requested entity (e.g., file or directory) was not found.
-  GrpcError.notFound([this.message, this.details, this.rawResponse])
+  const GrpcError.notFound([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.notFound;
 
   /// Some entity that we attempted to create (e.g., file or directory) already
   /// exists.
-  GrpcError.alreadyExists([this.message, this.details, this.rawResponse])
+  const GrpcError.alreadyExists([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.alreadyExists;
 
@@ -213,13 +215,15 @@ class GrpcError implements Exception {
   /// some resource (use [resourceExhausted] instead for those errors).
   /// [permissionDenied] must not be used if the caller cannot be identified
   /// (use [unauthenticated] instead for those errors).
-  GrpcError.permissionDenied([this.message, this.details, this.rawResponse])
+  const GrpcError.permissionDenied(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.permissionDenied;
 
   /// Some resource has been exhausted, perhaps a per-user quota, or perhaps the
   /// entire file system is out of space.
-  GrpcError.resourceExhausted([this.message, this.details, this.rawResponse])
+  const GrpcError.resourceExhausted(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.resourceExhausted;
 
@@ -237,7 +241,8 @@ class GrpcError implements Exception {
   ///     because the directory is non-empty, [failedPrecondition] should be
   ///     returned since the client should not retry unless they have first
   ///     fixed up the directory by deleting files from it.
-  GrpcError.failedPrecondition([this.message, this.details, this.rawResponse])
+  const GrpcError.failedPrecondition(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.failedPrecondition;
 
@@ -246,7 +251,7 @@ class GrpcError implements Exception {
   ///
   /// See litmus test above for deciding between [failedPrecondition],
   /// [aborted], and [unavailable].
-  GrpcError.aborted([this.message, this.details, this.rawResponse])
+  const GrpcError.aborted([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.aborted;
 
@@ -263,19 +268,19 @@ class GrpcError implements Exception {
   /// [outOfRange]. We recommend using [outOfRange] (the more specific error)
   /// when it applies so that callers who are iterating through a space can
   /// easily look for an [outOfRange] error to detect when they are done.
-  GrpcError.outOfRange([this.message, this.details, this.rawResponse])
+  const GrpcError.outOfRange([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.outOfRange;
 
   /// Operation is not implemented or not supported/enabled in this service.
-  GrpcError.unimplemented([this.message, this.details, this.rawResponse])
+  const GrpcError.unimplemented([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.unimplemented;
 
   /// Internal errors. Means some invariants expected by underlying system has
   /// been broken. If you see one of these errors, something is very broken.
   // TODO(sigurdm): This should probably not be an [Exception].
-  GrpcError.internal(
+  const GrpcError.internal(
       [this.message, this.details, this.rawResponse, this.trailers])
       : code = StatusCode.internal;
 
@@ -284,18 +289,19 @@ class GrpcError implements Exception {
   ///
   /// See litmus test above for deciding between [failedPrecondition],
   /// [aborted], and [unavailable].
-  GrpcError.unavailable([this.message, this.details, this.rawResponse])
+  const GrpcError.unavailable([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.unavailable;
 
   /// Unrecoverable data loss or corruption.
-  GrpcError.dataLoss([this.message, this.details, this.rawResponse])
+  const GrpcError.dataLoss([this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.dataLoss;
 
   /// The request does not have valid authentication credentials for the
   /// operation.
-  GrpcError.unauthenticated([this.message, this.details, this.rawResponse])
+  const GrpcError.unauthenticated(
+      [this.message, this.details, this.rawResponse])
       : trailers = const {},
         code = StatusCode.unauthenticated;
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 0129f38..88523a7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,7 +1,7 @@
 name: grpc
 description: Dart implementation of gRPC, a high performance, open-source universal RPC framework.
 
-version: 3.2.2
+version: 3.2.3-wip
 
 repository: https://github.com/grpc/grpc-dart