diff --git a/lib/build.gradle b/lib/build.gradle
index 5ec0211a..0328a8c2 100644
--- a/lib/build.gradle
+++ b/lib/build.gradle
@@ -3,7 +3,7 @@ plugins {
 }
 
 dependencies {
-    implementation 'org.eclipse.microprofile.openapi:microprofile-openapi-api:3.1.1'
+    implementation 'org.eclipse.microprofile.openapi:microprofile-openapi-api:4.0'
     testImplementation 'org.slf4j:slf4j-jdk14:2.0.16'
     testImplementation 'org.openapitools.empoa:empoa-simple-models-impl:2.1.0'
     testImplementation 'nl.jqno.equalsverifier:equalsverifier:3.16.2'