diff --git a/codegen/build.gradle.kts b/codegen/build.gradle.kts
index a0a733616..df6e5391c 100644
--- a/codegen/build.gradle.kts
+++ b/codegen/build.gradle.kts
@@ -15,5 +15,5 @@
 
 allprojects {
     group = "software.amazon.smithy.python"
-    version = "0.3.0"
+    version = "0.3.1"
 }
diff --git a/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/UnionGenerator.java b/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/UnionGenerator.java
index 4fe83d051..5242424ec 100644
--- a/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/UnionGenerator.java
+++ b/codegen/core/src/main/java/software/amazon/smithy/python/codegen/generators/UnionGenerator.java
@@ -62,12 +62,14 @@ public void run() {
 
             var target = model.expectShape(member.getTarget());
             var targetSymbol = symbolProvider.toSymbol(target);
+            writer.pushState();
+            writer.putContext("quote", recursiveShapes.contains(target) ? "'" : "");
             writer.write("""
                     @dataclass
                     class $1L:
                         ${2C|}
 
-                        value: $3T
+                        value: ${quote:L}$3T${quote:L}
 
                         def serialize(self, serializer: ShapeSerializer):
                             serializer.write_struct($4T, self)
@@ -92,6 +94,7 @@ def deserialize(cls, deserializer: ShapeDeserializer) -> Self:
                             new MemberDeserializerGenerator(context, w, member, "deserializer")))
 
             );
+            writer.popState();
         }
 
         // Note that the unknown variant doesn't implement __eq__. This is because