diff --git a/base/src/main/java/de/staropensource/sosengine/base/Engine.java b/base/src/main/java/de/staropensource/sosengine/base/Engine.java
index 0139762..b0ba65d 100644
--- a/base/src/main/java/de/staropensource/sosengine/base/Engine.java
+++ b/base/src/main/java/de/staropensource/sosengine/base/Engine.java
@@ -27,7 +27,6 @@ import de.staropensource.sosengine.base.types.LogIssuer;
 import de.staropensource.sosengine.base.utility.*;
 import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -52,7 +51,6 @@ public final class Engine {
      * @return {@link Engine} instance unless uninitialized
      * @since 1-alpha0
      */
-    @Nullable
     @Getter
     private static Engine instance = null;