diff --git a/io/eolearn/io/processing_api.py b/io/eolearn/io/processing_api.py
index 7708467ee..59ef3964d 100644
--- a/io/eolearn/io/processing_api.py
+++ b/io/eolearn/io/processing_api.py
@@ -206,6 +206,8 @@ def generate_evalscript(self):
         """ Generate the evalscript to be passed with the request, based on chosen bands
         """
         evalscript = """
+            //VERSION=3
+
             function setup() {{
                 return {{
                     input: [{{
@@ -363,6 +365,8 @@ def _build_payloads(self, bbox, size_x, size_y, timestamp, time_interval):
         """ Build payloads for the requests to the service
         """
         evalscript = """
+            //VERSION=3
+
             function setup() {
                 return {
                     input: ["DEM"],