diff --git a/rollup.config.js b/rollup.config.js
index 3008550..8dbe29f 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -45,7 +45,7 @@ const bundle = (format, filename, options = {}) => ({
 
 export default [
   bundle('cjs', pkg.main),
-  bundle('es', pkg.module),
+  bundle('esm', pkg.module),
   bundle('umd', pkg.browser.replace('.min', ''), { resolve: true, stats: true }),
   bundle('umd', pkg.browser, { resolve: true, minimize: true }),
 ];
\ No newline at end of file
diff --git a/spec/geodesic-circle.test.ts b/spec/geodesic-circle.test.ts
index 1eb12f9..2f348d0 100644
--- a/spec/geodesic-circle.test.ts
+++ b/spec/geodesic-circle.test.ts
@@ -19,6 +19,20 @@ const defaultOptions: GeodesicOptions = { wrap: true, steps: 24, fill: true, noC
 
 const eps = 0.000001;
 
+function checkFixture(specimen: L.LatLngLiteral[][], fixture: L.LatLngLiteral[][]): void {
+    expect(specimen).to.be.an("array");
+    expect(specimen).to.be.length(fixture.length);
+    specimen.forEach((line, k) => {
+        expect(line).to.be.length(fixture[k].length);
+        line.forEach((point, l) => {
+            expect(point).to.be.an("object");
+            expect(point).to.include.all.keys("lat", "lng");
+            expect(point.lat).to.be.closeTo(fixture[k][l].lat, eps);
+            expect(point.lng).to.be.closeTo(fixture[k][l].lng, eps);
+        });
+    });
+}
+
 describe("Main functionality", function () {
     let map: L.Map;
     const radius = 1000 * 1000;
@@ -100,4 +114,35 @@ describe("Main functionality", function () {
         expect(circle.statistics.vertices).to.be.equal(25);
     });
 
+});
+
+describe("Bugs", function () {
+    let map: L.Map;
+
+    beforeEach(function () {
+        map = L.map(document.createElement('div'));
+    });
+
+    afterEach(function () {
+        map.remove();
+    });
+
+    it("Calling getBounds on a GeodesicCircle throws an error (#48)", async function () {
+        const circle = new GeodesicCircleClass(Seattle, { radius: 10});
+        const group = new L.FeatureGroup([circle]).addTo(map);
+
+        expect(circle.options).to.be.deep.equal({ ...defaultOptions, ...{ radius: 10 } });
+        expect(circle.polyline).to.be.an("object");
+        expect(circle.center.lat).to.be.closeTo(Seattle.lat, eps);
+        expect(circle.center.lng).to.be.closeTo(Seattle.lng, eps);
+
+        expect(map.hasLayer(group)).to.be.true;
+        map.eachLayer(function (layer) {
+            expect(layer).to.be.instanceOf(L.FeatureGroup);
+        });
+
+        const bounds = group.getBounds();
+        expect(bounds).to.be.instanceOf(L.LatLngBounds);
+        checkFixture([[bounds.getCenter()]], [[Seattle]]);
+    });
 });
\ No newline at end of file
diff --git a/spec/geodesic-line.test.ts b/spec/geodesic-line.test.ts
index b6e66a8..3f04f24 100644
--- a/spec/geodesic-line.test.ts
+++ b/spec/geodesic-line.test.ts
@@ -265,3 +265,32 @@ describe("GeoJSON-Support", function () {
         expect(mockLog.mock.calls[0][0]).to.match(/Type "GeometryCollection" not supported/);
     });
 });
+
+describe("Re-Implementing Layer-Functions", function () {
+    let map: L.Map;
+
+    beforeEach(function () {
+        map = L.map(document.createElement('div'));
+    });
+
+    afterEach(function () {
+        map.remove();
+    });
+
+    it("getBounds()", async function () {
+        const line = new GeodesicLine([FlindersPeak, Buninyong]);
+        const group = new L.FeatureGroup([line]).addTo(map);
+
+        expect(line.options).to.be.deep.equal(defaultOptions);
+        expect(line.polyline).to.be.an("object");
+
+        expect(map.hasLayer(group)).to.be.true;
+        map.eachLayer(function (layer) {
+            expect(layer).to.be.instanceOf(L.FeatureGroup);
+        });
+
+        const bounds = group.getBounds();
+        expect(bounds).to.be.instanceOf(L.LatLngBounds);
+        checkFixture([[bounds.getCenter()]], [[{lat: (FlindersPeak.lat+Buninyong.lat)/2, lng: (FlindersPeak.lng+Buninyong.lng)/2}]]);
+    });
+});
\ No newline at end of file
diff --git a/src/geodesic-circle.ts b/src/geodesic-circle.ts
index ab35746..95a4dad 100644
--- a/src/geodesic-circle.ts
+++ b/src/geodesic-circle.ts
@@ -43,6 +43,10 @@ export class GeodesicCircleClass extends L.Layer {
         return this;
     }
 
+    getBounds(): L.LatLngBounds {
+        return this.polyline.getBounds();
+    }
+
     private update(): void {
         const latlngs = this.geom.circle(this.center, this.radius);
 
diff --git a/src/geodesic-line.ts b/src/geodesic-line.ts
index 9ec6b47..a5c516e 100644
--- a/src/geodesic-line.ts
+++ b/src/geodesic-line.ts
@@ -43,6 +43,10 @@ export class GeodesicLine extends L.Layer {
         return this;
     }
 
+    getBounds(): L.LatLngBounds {
+        return this.polyline.getBounds();
+    }
+        
     private updateLatLngs(latlngs: L.LatLngExpression[] | L.LatLngExpression[][]): void {
         const latLngLiteral = latlngExpressionArraytoLiteralArray(latlngs);
         const geodesic = this.geom.multiLineString(latLngLiteral);