diff --git a/core/src/main/java/org/mskcc/cbio/oncokb/cache/CustomRedisCache.java b/core/src/main/java/org/mskcc/cbio/oncokb/cache/CustomRedisCache.java
index bfb4aa77f..d56da4dea 100644
--- a/core/src/main/java/org/mskcc/cbio/oncokb/cache/CustomRedisCache.java
+++ b/core/src/main/java/org/mskcc/cbio/oncokb/cache/CustomRedisCache.java
@@ -9,6 +9,7 @@
 import org.springframework.cache.support.SimpleValueWrapper;
 
 import java.io.*;
+import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
@@ -168,4 +169,25 @@ protected Object fromStoreValue(Object storeValue) {
     protected Cache.ValueWrapper toValueWrapper(Object storeValue) {
         return (storeValue != null ? new SimpleValueWrapper(storeValue) : null);
     }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T> T get(Object key, Callable<T> valueLoader) {
+        // see https://docs.spring.io/spring-framework/docs/4.3.9.RELEASE/spring-framework-reference/html/cache.html#cache-annotations-cacheable-synchronized
+        LOG.warn("Sync method was enabled for cacheable. We do not currently support synchronized caching, so this is most likely a mistake.");
+
+		ValueWrapper storeValue = get(key);
+		if (storeValue != null) {
+			return (T) storeValue.get();
+		}
+
+		T value;
+        try {
+            value = valueLoader.call();
+        } catch (Throwable ex) {
+            throw new ValueRetrievalException(key, valueLoader, ex);
+        }
+        put(key, value);
+        return value;
+    }
 }
diff --git a/pom.xml b/pom.xml
index dde670c00..94e96783b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
         <java.version>1.8</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <hibernate.version>3.6.10.Final</hibernate.version>
-        <spring.version>4.2.2.RELEASE</spring.version>
+        <spring.version>4.3.30.RELEASE</spring.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
     </properties>