diff --git a/INSTALL.md b/INSTALL.md
index d77be2e..7c394e6 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -68,7 +68,8 @@ sudo apt install -yq predict \
                      socat \
                      php7.2-fpm \
                      php7.2-sqlite \
-                     sqlite3
+                     sqlite3 \
+                     libgfortran5
 ``` 
 
 ```
diff --git a/install.sh b/install.sh
index 1ad34ea..355ca41 100755
--- a/install.sh
+++ b/install.sh
@@ -62,7 +62,8 @@ sudo apt install -yq predict \
                      socat \
                      php7.2-fpm \
                      php7.2-sqlite \
-                     sqlite3
+                     sqlite3 \
+                     libgfortran5
 
 sudo pip3 install numpy ephem tweepy Pillow
 log_done "Packages installed"