diff --git a/env/.config/systemd/user/tmux-kill-sessions.service b/env/.config/systemd/user/tmux-kill-sessions.service
new file mode 100644
index 0000000..6b2c0f0
--- /dev/null
+++ b/env/.config/systemd/user/tmux-kill-sessions.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Tmux kill sessions service
+After=graphical-session.target
+
+[Service]
+Type=oneshot
+ExecStart=%h/.local/scripts/tmux-kill-old-sessions
diff --git a/env/.config/systemd/user/tmux-kill-sessions.timer b/env/.config/systemd/user/tmux-kill-sessions.timer
new file mode 100644
index 0000000..3111556
--- /dev/null
+++ b/env/.config/systemd/user/tmux-kill-sessions.timer
@@ -0,0 +1,11 @@
+[Unit]
+Description=Tmux kill sessions timer
+Requires=tmux-kill-sessions.service
+
+[Timer]
+OnBootSec=1min
+OnUnitActiveSec=2hours
+AccuracySec=10sec
+
+[Install]
+WantedBy=timers.target
diff --git a/env/.local/scripts/tmux-kill-old-sessions b/env/.local/scripts/tmux-kill-old-sessions
new file mode 100755
index 0000000..54ae675
--- /dev/null
+++ b/env/.local/scripts/tmux-kill-old-sessions
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Kills tmux sessions that are past the threshold to free up resources.
+#
+# Adapted from https://gist.github.com/dhulihan/4c65e868851660fb0d8bfa2d059e7967
+
+set -e
+set -o nounset
+set -o pipefail
+
+SCRIPTS=${SCRIPTS:-$HOME/.local/scripts}
+THIS_FILE=${BASH_SOURCE[0]}
+LOG_LABEL=$(basename "$THIS_FILE")
+THIS=${THIS:-$LOG_LABEL}
+LOG_FILE=${LOG_FILE:-"$LOG_LABEL.log"}
+
+# Threshold
+TOO_OLD_THRESHOLD=7200 # 2 hours
+NOW=$(date +%s)
+
+# Logging utility function, use in place of echo.
+log() {
+  logging log --source "$THIS_FILE" "$@"
+}
+
+################################################################################
+# MAIN
+################################################################################
+
+# Setup logging file and label.
+source "$SCRIPTS/hypr/logging"
+setup-logging "$LOG_FILE" "$LOG_LABEL"
+
+tmux ls -F '#{session_name}:#{session_activity}' | while read -r line; do
+  session_name=${line%:*}
+  last_activity=${line#*:}
+  elapsed=$((NOW - last_activity))
+
+  if [[ "$elapsed" -gt "$TOO_OLD_THRESHOLD" ]]; then
+    log "$session_name is ${elapsed}s inactive, killing..."
+    tmux kill-session -t "$session_name"
+  fi
+done
diff --git a/system b/system
index 4417240..5c9af4b 100755
--- a/system
+++ b/system
@@ -22,7 +22,7 @@ log() {
 }
 
 log_and_run() {
-  log "Running: \"$@\""
+  log "Running: \"$*\""
 
   if [[ $dry_run == "0" ]]; then
     eval $1
@@ -37,5 +37,6 @@ log_and_run "sudo setcap "cap_dac_override+p" $(which espanso)"
 
 log_and_run "systemctl --user enable --now logout-task.service"
 log_and_run "systemctl --user enable --now battery-monitor.timer"
+log_and_run "systemctl --user enable --now tmux-kill-sessions.timer"
 log_and_run "sudo systemctl enable --now pcscd.service"
 log_and_run "sudo systemctl enable --now firewalld.service"