diff --git a/stat/differential_analysis_practice.ipynb b/stat/differential_analysis_practice.ipynb
index 08377ca..3ce9e51 100644
--- a/stat/differential_analysis_practice.ipynb
+++ b/stat/differential_analysis_practice.ipynb
@@ -24,7 +24,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "We will start with uploading expression data table together with meta file containing brief sample description (age, ethnicity). While original study include both male and females profiles, we selected only the male ones for the simplicity of the further analysis. Processed files (*data_fibroblasts.csv* and *meta_fibroblasts.csv*) are available here: http://arcuda.skoltech.ru/~d.smirnov/ComputationalAgingCourse/"
+    "We will start with uploading expression data table together with meta file containing brief sample description (age, ethnicity). While original study include both male and females profiles, we selected only the male ones for the simplicity of the further analysis. Processed files (*data_fibroblasts.csv* and *meta_fibroblasts.csv*) are available here: https://www.dropbox.com/scl/fo/ma7zolpu62s9lcybjlc4h/AFIw64bZXGLumx9QJCfzCD4?rlkey=3agxgg1g91ehqa3rpordereyl&dl=0"
    ]
   },
   {
@@ -1032,7 +1032,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.8"
+   "version": "3.8.16"
   },
   "vscode": {
    "interpreter": {