diff --git a/docs/pom.xml b/docs/pom.xml
index da589be4..2b418984 100644
--- a/docs/pom.xml
+++ b/docs/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>spring-cloud-gateway-docs</artifactId>
 	<packaging>jar</packaging>
diff --git a/pom.xml b/pom.xml
index 7fc73b4f..7b587f9b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
 	<groupId>org.springframework.cloud</groupId>
 	<artifactId>spring-cloud-gateway</artifactId>
-	<version>4.0.3-SNAPSHOT</version>
+	<version>4.0.4-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<name>Spring Cloud Gateway</name>
diff --git a/spring-cloud-gateway-dependencies/pom.xml b/spring-cloud-gateway-dependencies/pom.xml
index a8636c3a..4c26e126 100644
--- a/spring-cloud-gateway-dependencies/pom.xml
+++ b/spring-cloud-gateway-dependencies/pom.xml
@@ -11,7 +11,7 @@
 	</parent>
 
 	<artifactId>spring-cloud-gateway-dependencies</artifactId>
-	<version>4.0.3-SNAPSHOT</version>
+	<version>4.0.4-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
 	<name>spring-cloud-gateway-dependencies</name>
diff --git a/spring-cloud-gateway-integration-tests/grpc/pom.xml b/spring-cloud-gateway-integration-tests/grpc/pom.xml
index 88767a5f..98f76dd0 100644
--- a/spring-cloud-gateway-integration-tests/grpc/pom.xml
+++ b/spring-cloud-gateway-integration-tests/grpc/pom.xml
@@ -17,7 +17,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway-integration-tests</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-gateway-integration-tests/http2/pom.xml b/spring-cloud-gateway-integration-tests/http2/pom.xml
index 66954306..51d83745 100644
--- a/spring-cloud-gateway-integration-tests/http2/pom.xml
+++ b/spring-cloud-gateway-integration-tests/http2/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway-integration-tests</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-gateway-integration-tests/mvc-failure-analyzer/pom.xml b/spring-cloud-gateway-integration-tests/mvc-failure-analyzer/pom.xml
index 0c28db6e..c1a55a43 100644
--- a/spring-cloud-gateway-integration-tests/mvc-failure-analyzer/pom.xml
+++ b/spring-cloud-gateway-integration-tests/mvc-failure-analyzer/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway-integration-tests</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-gateway-integration-tests/pom.xml b/spring-cloud-gateway-integration-tests/pom.xml
index 18a0d38a..970327de 100644
--- a/spring-cloud-gateway-integration-tests/pom.xml
+++ b/spring-cloud-gateway-integration-tests/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	
diff --git a/spring-cloud-gateway-mvc/pom.xml b/spring-cloud-gateway-mvc/pom.xml
index 31cd52c1..97eb510e 100644
--- a/spring-cloud-gateway-mvc/pom.xml
+++ b/spring-cloud-gateway-mvc/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/spring-cloud-gateway-sample/pom.xml b/spring-cloud-gateway-sample/pom.xml
index 97554a3f..d1fb913e 100644
--- a/spring-cloud-gateway-sample/pom.xml
+++ b/spring-cloud-gateway-sample/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/spring-cloud-gateway-server/pom.xml b/spring-cloud-gateway-server/pom.xml
index b0d81592..0134d282 100644
--- a/spring-cloud-gateway-server/pom.xml
+++ b/spring-cloud-gateway-server/pom.xml
@@ -7,7 +7,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-gateway-server</artifactId>
diff --git a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilter.java b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilter.java
index 135bd560..1902b6e5 100644
--- a/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilter.java
+++ b/spring-cloud-gateway-server/src/main/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilter.java
@@ -44,13 +44,15 @@ public class ObservedResponseHttpHeadersFilter implements HttpHeadersFilter {
 		if (childObservation == null) {
 			return input;
 		}
-		GatewayContext context = (GatewayContext) childObservation.getContext();
-		if (log.isDebugEnabled()) {
-			log.debug("Will instrument the response");
-		}
-		context.setResponse(exchange.getResponse());
-		if (log.isDebugEnabled()) {
-			log.debug("The response was handled for observation " + childObservation);
+		Observation.Context childObservationContext = childObservation.getContext();
+		if (childObservationContext instanceof GatewayContext context) {
+			if (log.isDebugEnabled()) {
+				log.debug("Will instrument the response");
+			}
+			context.setResponse(exchange.getResponse());
+			if (log.isDebugEnabled()) {
+				log.debug("The response was handled for observation " + childObservation);
+			}
 		}
 		childObservation.stop();
 		exchange.getAttributes().put(OBSERVATION_STOPPED, "true");
diff --git a/spring-cloud-gateway-server/src/test/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilterTests.java b/spring-cloud-gateway-server/src/test/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilterTests.java
new file mode 100644
index 00000000..64ba0135
--- /dev/null
+++ b/spring-cloud-gateway-server/src/test/java/org/springframework/cloud/gateway/filter/headers/observation/ObservedResponseHttpHeadersFilterTests.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2013-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.gateway.filter.headers.observation;
+
+import io.micrometer.observation.Observation;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;
+import org.springframework.http.HttpHeaders;
+import org.springframework.mock.http.server.reactive.MockServerHttpRequest;
+import org.springframework.mock.web.server.MockServerWebExchange;
+import org.springframework.web.server.ServerWebExchange;
+
+import static org.assertj.core.api.BDDAssertions.thenNoException;
+
+class ObservedResponseHttpHeadersFilterTests {
+
+	@Test
+	void shouldDoNothingWhenObservationIsNoOp() {
+		MockServerHttpRequest request = MockServerHttpRequest.get("/get").build();
+		ServerWebExchange exchange = MockServerWebExchange.from(request);
+		exchange.getAttributes().put(ServerWebExchangeUtils.GATEWAY_OBSERVATION_ATTR, Observation.NOOP);
+		ObservedResponseHttpHeadersFilter filter = new ObservedResponseHttpHeadersFilter();
+
+		thenNoException().isThrownBy(() -> filter.filter(new HttpHeaders(), exchange));
+	}
+
+}
diff --git a/spring-cloud-gateway-webflux/pom.xml b/spring-cloud-gateway-webflux/pom.xml
index 092ef82d..6a327e65 100644
--- a/spring-cloud-gateway-webflux/pom.xml
+++ b/spring-cloud-gateway-webflux/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath>
 	</parent>
 
diff --git a/spring-cloud-starter-gateway/pom.xml b/spring-cloud-starter-gateway/pom.xml
index b81fe367..c336304a 100644
--- a/spring-cloud-starter-gateway/pom.xml
+++ b/spring-cloud-starter-gateway/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-gateway</artifactId>
-		<version>4.0.3-SNAPSHOT</version>
+		<version>4.0.4-SNAPSHOT</version>
 		<relativePath>..</relativePath> <!-- lookup parent from repository -->
 	</parent>
 	<artifactId>spring-cloud-starter-gateway</artifactId>