diff --git a/src/propeller/problems/complex_regression.cljc b/src/propeller/problems/complex_regression.cljc
index 4982594..4478ad4 100644
--- a/src/propeller/problems/complex_regression.cljc
+++ b/src/propeller/problems/complex_regression.cljc
@@ -7,10 +7,10 @@
             #?(:cljs [cljs.reader :refer [read-string]])))
 
 (defn- target-function
-  "Target function: f(x) = (x^3 + 1)^3 + 1"
+  "Target function: f(x) = (x^3 + 1)^2 + 1"
   [x]
   (let [x-new (+ (* x x x) 1)]
-    (+ (* x-new x-new x-new) 1)))
+    (+ (* x-new x-new) 1)))
 
 (def train-and-test-data
   (let [train-inputs (range -5.0 5.0 0.5)