diff --git a/requirements.txt b/requirements.txt
index c7d0459..0281f9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,5 +3,5 @@ scipy==1.5.4
 matplotlib==3.3.4
 pillow==8.1.1
 seaborn==0.11.1
-xlsxwriter >= 0.8.4
+xlsxwriter==3.1.9
 pathlib2
diff --git a/setup.py b/setup.py
index 328c2ae..bd6297d 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
                     'matplotlib==3.3.4',
                     'pillow==8.1.1',
                     'seaborn==0.11.1',
-                    'xlsxwriter >= 0.8.4',
+                    'xlsxwriter==3.1.9',
                     'pathlib2']
 
 # Acquire package version for installation