diff --git a/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb b/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
index 11ed3d4821b85ee3751c6fe90af85f8cfd4fee35..f49723761f36e09fba37f2e87900cb21df22464c 100644
--- a/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
+++ b/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
@@ -348,7 +348,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## TASK 5: Determining *k*"
+    "## TASK 4: Determining *k*"
    ]
   },
   {
@@ -387,7 +387,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## TASK 6: ROC curve analysis\n",
+    "## TASK 5: ROC curve analysis\n",
     "* Correct implementation +20, +20"
    ]
   },
@@ -422,7 +422,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## TASK 7: Assess suitability of *k*-NN to your dataset"
+    "## TASK 6: Assess suitability of *k*-NN to your dataset"
    ]
   },
   {