diff --git a/exercises/day-02/exercise_set_2.ipynb b/exercises/day-02/exercise_set_2.ipynb
index c273717..7a5e43a 100644
--- a/exercises/day-02/exercise_set_2.ipynb
+++ b/exercises/day-02/exercise_set_2.ipynb
@@ -11,7 +11,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/africa-summer-course-2024/blob/main/exercises/day-02/exercise_set_2_with_solution.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
+    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/africa-summer-course-2024/blob/main/exercises/day-02/exercise_set_2.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
     "  src=\"https://colab.research.google.com/assets/colab-badge.svg\"\n",
     "  alt=\"open with Colab\" width=\"100px\"/></a></button></div>"
    ]
diff --git a/exercises/day-05/exercise_set_5.ipynb b/exercises/day-05/exercise_set_5.ipynb
index 56953a4..554bd88 100644
--- a/exercises/day-05/exercise_set_5.ipynb
+++ b/exercises/day-05/exercise_set_5.ipynb
@@ -11,7 +11,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/workshop.africa-july2024/blob/main/day-05/exercise_set_5.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
+    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/africa-summer-course-2024/blob/main/exercises/day-05/exercise_set_5.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
     "  src=\"https://colab.research.google.com/assets/colab-badge.svg\"\n",
     "  alt=\"open with Colab\" width=\"100px\"/></a></button></div>"
    ]
diff --git a/exercises/day-08/exercise_set_08_with_solutions.ipynb b/exercises/day-08/exercise_set_08_with_solutions.ipynb
index aea3fe8..94646fc 100644
--- a/exercises/day-08/exercise_set_08_with_solutions.ipynb
+++ b/exercises/day-08/exercise_set_08_with_solutions.ipynb
@@ -7,7 +7,7 @@
    "source": [
     "# Commodity prices and Markov chains\n",
     "\n",
-    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/africa-summer-course-2024/blob/main/exercises/day-08/exercise_set_08_with_solution.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
+    "<div align=\"right\"><button><a href=\"https://colab.research.google.com/github/QuantEcon/africa-summer-course-2024/blob/main/exercises/day-08/exercise_set_08_with_solutions.ipynb\"><img src=\"\" heght=\"10px\"/><img\n",
     "  src=\"https://colab.research.google.com/assets/colab-badge.svg\"\n",
     "  alt=\"open with Colab\" width=\"100px\"/></a></button></div>\n",
     "\n",