diff --git a/package.json b/package.json
index 77efa41..02c07b0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chartwerk/gauge-pod",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "Chartwerk gauge pod",
   "main": "dist/index.js",
   "scripts": {
diff --git a/src/models/gauge_options.ts b/src/models/gauge_options.ts
index dcbdaee..a0586e9 100644
--- a/src/models/gauge_options.ts
+++ b/src/models/gauge_options.ts
@@ -11,7 +11,6 @@ const DEFAULT_OUTER_RADIUS = 72;
 
 export const CORE_OPTIONS_DEFAULTS = {
   renderLegend: false,
-  // TODO: find a method in lodash (defaultsDeep?)
   grid: {
     x: {
       enabled: false
@@ -82,11 +81,7 @@ const GAUGE_OPTIONS_DEFAULTS: GaugeConfig = {
 export class GaugeOptions extends CoreOptions<GaugeConfig> {
 
   constructor(options: GaugeConfig) {
-    super(options);
-  }
-
-  protected get defaults(): GaugeConfig {
-    return { ...this._coreDefaults, ...GAUGE_OPTIONS_DEFAULTS };
+    super(options, { ...CORE_OPTIONS_DEFAULTS, ...GAUGE_OPTIONS_DEFAULTS });
   }
 
   get icons(): IconConfig[] {
diff --git a/src/models/gauge_series.ts b/src/models/gauge_series.ts
index 7ce61ba..fd97fea 100644
--- a/src/models/gauge_series.ts
+++ b/src/models/gauge_series.ts
@@ -8,10 +8,6 @@ const GAUGE_DATA_DEFAULTS = { };
 export class GaugeSeries extends CoreSeries<GaugeData> {
 
   constructor(series: GaugeData[]) {
-    super(series);
-  }
-
-  protected get defaults(): GaugeData {
-    return { ...this._coreDefaults, ...GAUGE_DATA_DEFAULTS };
+    super(series, GAUGE_DATA_DEFAULTS);
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 88bfda2..c751dd2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6,12 +6,12 @@ __metadata:
   cacheKey: 8
 
 "@chartwerk/core@npm:latest":
-  version: 0.6.3
-  resolution: "@chartwerk/core@npm:0.6.3"
+  version: 0.6.5
+  resolution: "@chartwerk/core@npm:0.6.5"
   dependencies:
     d3: ^5.7.2
     lodash: ^4.14.149
-  checksum: bb804b1a2339fc19857e5caa07d16ed78fb1b0739878d3f7488e9f8661667ed78ada3a63afd15206bd4210746b50916b253e98f077451cc8d899728ecf08ba50
+  checksum: 2757ae8be04b84c3624bd807a437d6bf3c67fef0808e3192f0a97ba819627f3b28821628cfefdfabe1951e8b7d0d45d1b9f6ade13cdc4a5bca5e539fc70850df
   languageName: node
   linkType: hard