diff --git a/src/main/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactory.java b/src/main/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactory.java
index d4eb851560d..09dbe3d6efa 100644
--- a/src/main/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactory.java
+++ b/src/main/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactory.java
@@ -36,7 +36,7 @@ public JHipsterModule buildModule(JHipsterModuleProperties properties) {
         .addDependency(GROUP_ID, OPEN_AI_ARTIFACT_ID, VERSION_SLUG)
         .and()
       .springMainProperties()
-        .set(LANGCHAIN4J_PROPERTY_API_KEY, propertyValue("${OPENAI_API_KEY}"))
+        .set(LANGCHAIN4J_PROPERTY_API_KEY, propertyValue("demo"))
           .comment(LANGCHAIN4J_PROPERTY_API_KEY, comment(API_KEY_DEMO_COMMENT))
         .set(propertyKey("langchain4j.open-ai.chat-model.model-name"), propertyValue("gpt-4o-mini"))
         .set(propertyKey("langchain4j.open-ai.chat-model.log-requests"), propertyValue("true"))
diff --git a/src/test/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactoryTest.java b/src/test/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactoryTest.java
index 77d40161737..b4d83f5ce08 100644
--- a/src/test/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactoryTest.java
+++ b/src/test/java/tech/jhipster/lite/generator/server/springboot/langchain4j/domain/LangChain4jModuleFactoryTest.java
@@ -58,7 +58,7 @@ void shouldCreateModule() {
           open-ai:
             chat-model:
               # You can temporarily use 'demo' key, which is provided for free for demonstration purposes
-              api-key: ${OPENAI_API_KEY}
+              api-key: demo
               log-requests: 'true'
               log-responses: 'true'
               model-name: gpt-4o-mini