diff --git a/src/layer/AbstractSentinelHubV3Layer.ts b/src/layer/AbstractSentinelHubV3Layer.ts
index eef69afe..d2cd08a0 100644
--- a/src/layer/AbstractSentinelHubV3Layer.ts
+++ b/src/layer/AbstractSentinelHubV3Layer.ts
@@ -100,8 +100,16 @@ export class AbstractSentinelHubV3Layer extends AbstractLayer {
       if (!this.dataset) {
         throw new Error('This layer does not support Processing API (unknown dataset)');
       }
-      if (this.evalscriptUrl) {
-        throw new Error('EvalscriptUrl is not supported with Processing API');
+      if (this.evalscriptUrl && !this.evalscript) {
+        const response = await axios.get(this.evalscriptUrl, { responseType: 'text', useCache: true });
+        let evalscriptV3;
+        //Check version of fetched evalscript by checking if first line starts with //VERSION=3
+        if (response.data.startsWith('//VERSION=3')) {
+          evalscriptV3 = response.data;
+        } else {
+          evalscriptV3 = await this.convertEvalscriptToV3(response.data);
+        }
+        this.evalscript = evalscriptV3;
       }
       if (!this.evalscript && !this.dataProduct) {
         const layerParams = await this.fetchLayerParamsFromSHServiceV3();
@@ -240,4 +248,19 @@ export class AbstractSentinelHubV3Layer extends AbstractLayer {
     found.sort((a, b) => b.unix() - a.unix());
     return found.map(m => m.toDate());
   }
+
+  protected async convertEvalscriptToV3(evalscript: string): Promise<string> {
+    const authToken = getAuthToken();
+    const url = `https://services.sentinel-hub.com/api/v1/process/convertscript?datasetType=${this.dataset.shProcessingApiDatasourceAbbreviation}`;
+    const requestConfig: AxiosRequestConfig = {
+      headers: {
+        Authorization: `Bearer ${authToken}`,
+        'Content-Type': 'application/ecmascript',
+      },
+      useCache: true,
+      responseType: 'text',
+    };
+    const res = await axios.post(url, evalscript, requestConfig);
+    return res.data;
+  }
 }
diff --git a/stories/s1grdiw.stories.js b/stories/s1grdiw.stories.js
index c8691989..e028cab3 100644
--- a/stories/s1grdiw.stories.js
+++ b/stories/s1grdiw.stories.js
@@ -254,6 +254,52 @@ export const getMapProcessingFromLayer = () => {
   return wrapperEl;
 };
 
+export const GetMapProcessingEvalscripturl = () => {
+  if (!process.env.CLIENT_ID || !process.env.CLIENT_SECRET) {
+    return "<div>Please set OAuth Client's id and secret for Processing API (CLIENT_ID, CLIENT_SECRET env vars)</div>";
+  }
+
+  const img = document.createElement('img');
+  img.width = '512';
+  img.height = '512';
+
+  const wrapperEl = document.createElement('div');
+  wrapperEl.innerHTML = '<h2>GetMap with Processing setting evalscriptUrl with v2 script</h2>';
+  wrapperEl.insertAdjacentElement('beforeend', img);
+
+  // getMap is async:
+  const perform = async () => {
+    await setAuthTokenWithOAuthCredentials();
+
+    const layer = new S1GRDAWSEULayer({
+      instanceId,
+      layerId,
+      evalscriptUrl:
+        'https://raw.githubusercontent.com/sentinel-hub/custom-scripts/cf4930ae0dd6d155f80ff311d6d862ca28de412b/sentinel-1/sar_for_deforestation/script.js',
+    });
+
+    const getMapParams = {
+      bbox: new BBox(
+        CRS_EPSG4326,
+        12.089080810546877,
+        44.625908121970454,
+        12.250614166259767,
+        44.74210015957899,
+      ),
+      fromTime: new Date(Date.UTC(2018, 8 - 1, 28, 0, 0, 0)),
+      toTime: new Date(Date.UTC(2018, 8 - 1, 28, 23, 59, 59)),
+      width: 512,
+      height: 512,
+      format: MimeTypes.JPEG,
+    };
+    const imageBlob = await layer.getMap(getMapParams, ApiType.PROCESSING);
+    img.src = URL.createObjectURL(imageBlob);
+  };
+  perform().then(() => {});
+
+  return wrapperEl;
+};
+
 export const findTilesEPSG3857 = () => {
   const layer = new S1GRDAWSEULayer({ instanceId, layerId });
 
diff --git a/stories/s2l2a.stories.js b/stories/s2l2a.stories.js
index 91cf7f6a..f76c2c07 100644
--- a/stories/s2l2a.stories.js
+++ b/stories/s2l2a.stories.js
@@ -231,6 +231,95 @@ export const GetMapProcessingWithGeometryPolygon = () => {
   return wrapperEl;
 };
 
+export const GetMapProcessingEvalscripturl = () => {
+  if (!process.env.CLIENT_ID || !process.env.CLIENT_SECRET) {
+    return "<div>Please set OAuth Client's id and secret for Processing API (CLIENT_ID, CLIENT_SECRET env vars)</div>";
+  }
+
+  const img = document.createElement('img');
+  img.width = '512';
+  img.height = '512';
+
+  const wrapperEl = document.createElement('div');
+  wrapperEl.innerHTML = '<h2>GetMap with Processing for Sentinel-2 L2A by setting evalscriptUrl</h2>';
+  wrapperEl.insertAdjacentElement('beforeend', img);
+
+  // getMap is async:
+  const perform = async () => {
+    await setAuthTokenWithOAuthCredentials();
+
+    const layerS2L2A = new S2L2ALayer({
+      evalscriptUrl:
+        'https://raw.githubusercontent.com/sentinel-hub/custom-scripts/master/sentinel-2/ulyssys_water_quality_viewer/src/script.js',
+    });
+
+    const getMapParams = {
+      bbox: new BBox(
+        CRS_EPSG4326,
+        17.416763305664066,
+        46.6560347296143,
+        18.06289672851563,
+        47.102849101370325,
+      ),
+      fromTime: new Date(Date.UTC(2019, 9 - 1, 5, 0, 0, 0)),
+      toTime: new Date(Date.UTC(2019, 9 - 1, 5, 23, 59, 59)),
+      width: 512,
+      height: 512,
+      format: MimeTypes.JPEG,
+    };
+    const imageBlob = await layerS2L2A.getMap(getMapParams, ApiType.PROCESSING);
+    img.src = URL.createObjectURL(imageBlob);
+  };
+  perform().then(() => {});
+
+  return wrapperEl;
+};
+
+export const GetMapProcessingEvalscripturlVersion2 = () => {
+  if (!process.env.CLIENT_ID || !process.env.CLIENT_SECRET) {
+    return "<div>Please set OAuth Client's id and secret for Processing API (CLIENT_ID, CLIENT_SECRET env vars)</div>";
+  }
+
+  const img = document.createElement('img');
+  img.width = '512';
+  img.height = '512';
+
+  const wrapperEl = document.createElement('div');
+  wrapperEl.innerHTML =
+    '<h2>GetMap with Processing for Sentinel-2 L2A by setting evalscriptUrl with version2 script for ndwi</h2>';
+  wrapperEl.insertAdjacentElement('beforeend', img);
+
+  // getMap is async:
+  const perform = async () => {
+    await setAuthTokenWithOAuthCredentials();
+
+    const layerS2L2A = new S2L2ALayer({
+      evalscriptUrl:
+        'https://gist.githubusercontent.com/dgostencnik/49a8620816d47d75a2bb8433eea03984/raw/6a478bc7d6e898f2720385738fb38889424f4483/s2-ndwi-v2',
+    });
+
+    const getMapParams = {
+      bbox: new BBox(
+        CRS_EPSG4326,
+        17.416763305664066,
+        46.6560347296143,
+        18.06289672851563,
+        47.102849101370325,
+      ),
+      fromTime: new Date(Date.UTC(2019, 9 - 1, 5, 0, 0, 0)),
+      toTime: new Date(Date.UTC(2019, 9 - 1, 5, 23, 59, 59)),
+      width: 512,
+      height: 512,
+      format: MimeTypes.JPEG,
+    };
+    const imageBlob = await layerS2L2A.getMap(getMapParams, ApiType.PROCESSING);
+    img.src = URL.createObjectURL(imageBlob);
+  };
+  perform().then(() => {});
+
+  return wrapperEl;
+};
+
 export const GetMapWMSMaxCC20vs60 = () => {
   const layerS2L2A20 = new S2L2ALayer({ instanceId, layerId, maxCloudCoverPercent: 20 });
   const layerS2L2A60 = new S2L2ALayer({ instanceId, layerId, maxCloudCoverPercent: 60 });