diff --git a/envs/environment.fixed.yaml b/envs/environment.fixed.yaml
index 9d2b331c..516e5ec5 100644
--- a/envs/environment.fixed.yaml
+++ b/envs/environment.fixed.yaml
@@ -229,7 +229,7 @@ dependencies:
 - numpy=1.23.5
 - openjdk=17.0.3
 - openjpeg=2.5.0
-- openpyxl=3.1.1
+- openpyxl=3.1.0
 - openssl=3.0.8
 - packaging=23.0
 - pandas=1.5.3
diff --git a/envs/environment.yaml b/envs/environment.yaml
index 3e366074..9325ac09 100644
--- a/envs/environment.yaml
+++ b/envs/environment.yaml
@@ -16,7 +16,7 @@ dependencies:
 
   # Dependencies of the workflow itself
 - xlrd
-- openpyxl
+- openpyxl!=3.1.1
 - pycountry
 - seaborn
 - snakemake-minimal