diff --git a/src/application/worker/store/modules/expressions.js b/src/application/worker/store/modules/expressions.js
index 90099345e..001c3ddb8 100644
--- a/src/application/worker/store/modules/expressions.js
+++ b/src/application/worker/store/modules/expressions.js
@@ -1,5 +1,5 @@
-import math from "mathjs";
 import uuidv4 from "uuid/v4";
+const math = require("mathjs");
 
 const state = {
   assignments: {}
@@ -22,7 +22,7 @@ function compileExpression(expression) {
     const node = math.parse(expression, scope);
 
     newFunction = node.compile();
-    newFunction.eval(scope);
+    newFunction.evaluate(scope);
   } catch (e) {
     throw e;
   }
diff --git a/src/application/worker/store/modules/modules.js b/src/application/worker/store/modules/modules.js
index e4be765e4..7e326c88e 100644
--- a/src/application/worker/store/modules/modules.js
+++ b/src/application/worker/store/modules/modules.js
@@ -351,7 +351,7 @@ const actions = {
         time: Date.now()
       };
 
-      dataOut = expressionAssignment.func.eval(scope);
+      dataOut = expressionAssignment.func.evaluate(scope);
     }
 
     if (store.state.dataTypes[type] && store.state.dataTypes[type].create) {