diff --git a/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/BooleanPreferences.java b/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/BooleanPreferences.java
index 1d31b44..657c83c 100644
--- a/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/BooleanPreferences.java
+++ b/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/BooleanPreferences.java
@@ -57,7 +57,7 @@ public Boolean getDef() {
 	public void setValue(Boolean value) {
 		PREFERENCES.putBoolean(key, value);
 		try {
-			PREFERENCES.sync();
+			PREFERENCES.flush();
 		} catch (BackingStoreException e) {
 			LogHelper.error("Exception whilst persisting preference " + this.getKey(), e);
 		}
diff --git a/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/StringPreferences.java b/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/StringPreferences.java
index 65d73af..79a7828 100644
--- a/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/StringPreferences.java
+++ b/eclipse-solargraph-plugin/src/main/java/io/github/pyvesb/eclipse_solargraph/preferences/StringPreferences.java
@@ -59,7 +59,7 @@ public String getDef() {
 	public void setValue(String value) {
 		PREFERENCES.put(key, value);
 		try {
-			PREFERENCES.sync();
+			PREFERENCES.flush();
 		} catch (BackingStoreException e) {
 			LogHelper.error("Exception whilst persisting preference " + this.getKey(), e);
 		}