diff --git a/src/main/java/org/gcube/dataanalysis/executor/rscripts/generic/GenericRScript.java b/src/main/java/org/gcube/dataanalysis/executor/rscripts/generic/GenericRScript.java
index 869819a..15559fb 100644
--- a/src/main/java/org/gcube/dataanalysis/executor/rscripts/generic/GenericRScript.java
+++ b/src/main/java/org/gcube/dataanalysis/executor/rscripts/generic/GenericRScript.java
@@ -104,7 +104,7 @@ public abstract class GenericRScript extends StandardLocalInfraAlgorithm {
 			HashMap<String, String> environmentalParameters = new LinkedHashMap<String, String>();
 			for (String environment : environmentalvariables) {
 				String value = config.getParam(environment);
-				environmentalParameters.put(environment, value);
+				environmentalParameters.put(environment, "\""+value+"\"");
 			}
 			LOGGER.debug("Environmental: " + environmentalParameters.toString());
 			LOGGER.debug("Analysing output variables");