diff --git a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlAutoConfiguration.java b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlAutoConfiguration.java
index 1d61f141..2fbc2615 100644
--- a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlAutoConfiguration.java
+++ b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlAutoConfiguration.java
@@ -46,7 +46,7 @@ import org.springframework.graphql.execution.GraphQlSource;
  * @since 1.0.0
  */
 @Configuration(proxyBeanMethods = false)
-@ConditionalOnClass(GraphQL.class)
+@ConditionalOnClass({GraphQL.class, GraphQlSource.class})
 @ConditionalOnMissingBean(GraphQlSource.class)
 @EnableConfigurationProperties(GraphQlProperties.class)
 public class GraphQlAutoConfiguration {
diff --git a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlServiceAutoConfiguration.java b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlServiceAutoConfiguration.java
index 16e34ef8..6729dda5 100644
--- a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlServiceAutoConfiguration.java
+++ b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlServiceAutoConfiguration.java
@@ -36,7 +36,7 @@ import org.springframework.graphql.execution.GraphQlSource;
  * @since 1.0.0
  */
 @Configuration(proxyBeanMethods = false)
-@ConditionalOnClass(GraphQL.class)
+@ConditionalOnClass({GraphQL.class, GraphQlService.class})
 @ConditionalOnMissingBean(GraphQlService.class)
 @AutoConfigureAfter(GraphQlAutoConfiguration.class)
 public class GraphQlServiceAutoConfiguration {
diff --git a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebFluxAutoConfiguration.java b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebFluxAutoConfiguration.java
index 6b25323c..349d6a20 100644
--- a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebFluxAutoConfiguration.java
+++ b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebFluxAutoConfiguration.java
@@ -66,7 +66,7 @@ import static org.springframework.web.reactive.function.server.RequestPredicates
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
-@ConditionalOnClass(GraphQL.class)
+@ConditionalOnClass({GraphQL.class, GraphQlHttpHandler.class})
 @ConditionalOnBean(GraphQlSource.class)
 @AutoConfigureAfter(GraphQlServiceAutoConfiguration.class)
 public class GraphQlWebFluxAutoConfiguration {
diff --git a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebMvcAutoConfiguration.java b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebMvcAutoConfiguration.java
index 6442fa7f..5b7e976c 100644
--- a/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebMvcAutoConfiguration.java
+++ b/graphql-spring-boot-starter/src/main/java/org/springframework/graphql/boot/GraphQlWebMvcAutoConfiguration.java
@@ -73,7 +73,7 @@ import static org.springframework.web.servlet.function.RequestPredicates.content
  */
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
-@ConditionalOnClass(GraphQL.class)
+@ConditionalOnClass({GraphQL.class, GraphQlHttpHandler.class})
 @ConditionalOnBean(GraphQlSource.class)
 @AutoConfigureAfter(GraphQlServiceAutoConfiguration.class)
 public class GraphQlWebMvcAutoConfiguration {