diff --git a/requirements.txt b/requirements.txt
index f591d4d..1f116b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,17 +1,16 @@
-numpy>=1.7.1
-scipy>=0.9
-pandas>=0.20
-pandas<=1.9
-lxml # pandas needs this for html
-scikit-learn>=1.2
-joblib
-statsmodels>=0.13
-lifelines
-pygam # for GAM in Ch7
-l0bnb==1.0.0 # for bestsubsets
-ISLP
-torch
-pytorch_lightning
-torchmetrics
-torchvision
-torchinfo
+numpy==1.24.2
+scipy==1.11.1
+pandas==1.5.3
+lxml==4.9.3
+scikit-learn==1.3.0
+joblib==1.3.1
+statsmodels==0.14.0
+lifelines==0.27.7
+pygam==0.9.0
+l0bnb==1.0.0
+torch==2.0.1
+torchvision==0.15.2
+pytorch-lightning==2.0.6
+torchinfo==1.8.0
+torchmetrics==1.0.1
+ISLP==0.3.18