diff --git a/src/main/java/org/snomed/snowstorm/core/data/domain/Concepts.java b/src/main/java/org/snomed/snowstorm/core/data/domain/Concepts.java
index b533312d3..7fe2f3b7e 100644
--- a/src/main/java/org/snomed/snowstorm/core/data/domain/Concepts.java
+++ b/src/main/java/org/snomed/snowstorm/core/data/domain/Concepts.java
@@ -14,6 +14,7 @@ public class Concepts {
 	public static final String CORE_MODULE = "900000000000207008";
 	public static final String MODEL_MODULE = "900000000000012004";
 	public static final String ICD10_MODULE = "449080006";
+	public static final String ICD11_MODULE = "1204363008";
 	public static final String COMMON_FRENCH_MODULE = "11000241103";
 	public static final String MODULE = "900000000000443000";
 
diff --git a/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java b/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
index 3263e4c19..c6e6140c8 100644
--- a/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
+++ b/src/main/java/org/snomed/snowstorm/core/data/services/ModuleDependencyService.java
@@ -42,7 +42,7 @@ public class ModuleDependencyService extends ComponentService {
 	
 	public static final Set<String> CORE_MODULES = Set.of(Concepts.CORE_MODULE, Concepts.MODEL_MODULE);
 	
-	public Set<String> SI_MODULES = new HashSet<>(Set.of(Concepts.CORE_MODULE, Concepts.MODEL_MODULE, Concepts.ICD10_MODULE));
+	public Set<String> SI_MODULES = new HashSet<>(Set.of(Concepts.CORE_MODULE, Concepts.MODEL_MODULE, Concepts.ICD10_MODULE, Concepts.ICD11_MODULE));
 	
 	@Autowired
 	private BranchService branchService;
@@ -94,10 +94,13 @@ public synchronized void refreshCache() {
 			cacheValidAt = currentTime;
 			logger.info("MDR cache of International Modules refreshed for HEAD time: {}", currentTime);
 			
-			//During unit tests, or in non-standard installations we might not see the ICD-10 Module
+			//During unit tests, or in non-standard installations we might not see the ICD-10 and ICD-11 Modules
 			if (!cachedInternationalModules.contains(Concepts.ICD10_MODULE)) {
 				SI_MODULES.remove(Concepts.ICD10_MODULE);
 			}
+			if (!cachedInternationalModules.contains(Concepts.ICD11_MODULE)) {
+				SI_MODULES.remove(Concepts.ICD11_MODULE);
+			}
 			
 			derivativeModules = cachedInternationalModules.stream()
 					.filter(m -> !SI_MODULES.contains(m))