diff --git a/tmux.conf b/tmux.conf
new file mode 100644
index 0000000..a9a2c31
--- /dev/null
+++ b/tmux.conf
@@ -0,0 +1,2 @@
+set-option -g default-shell /bin/zsh
+set-option -g default-terminal tmux-256color
diff --git a/zshrc b/zshrc
index 00790c5..f6c2d19 100644
--- a/zshrc
+++ b/zshrc
@@ -49,3 +49,9 @@ fi
 
 ## Dircolors
 eval `dircolors ~/.config/dircolors-solarized/dircolors.256dark`
+
+# The next line updates PATH for the Google Cloud SDK.
+if [ -f '/home/paul/.local/share/google-cloud-sdk/path.zsh.inc' ]; then . '/home/paul/.local/share/google-cloud-sdk/path.zsh.inc'; fi
+
+# The next line enables shell command completion for gcloud.
+if [ -f '/home/paul/.local/share/google-cloud-sdk/completion.zsh.inc' ]; then . '/home/paul/.local/share/google-cloud-sdk/completion.zsh.inc'; fi