diff --git a/files/docker-prune-dangling-images.sh b/files/docker-prune-dangling-images.sh
index ea6c5d3..d25ae12 100644
--- a/files/docker-prune-dangling-images.sh
+++ b/files/docker-prune-dangling-images.sh
@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+LOG_FILE="/var/log/docker-system-prune.log"
+echo "===== $(date '+%Y-%m-%d %H:%M:%S') =====" >> "$LOG_FILE"
 # "system" prune, because pruning images only leaves a lot of garbage around
-docker system prune  --force >> /var/log/docker-system-prune.log 2>&1
+docker system prune  --force >> "$LOG_FILE" 2>&1
+
+echo "" >> "$LOG_FILE"
 exit 0
diff --git a/files/docker-prune-dangling-volumes.sh b/files/docker-prune-dangling-volumes.sh
index d78590e..28f6759 100644
--- a/files/docker-prune-dangling-volumes.sh
+++ b/files/docker-prune-dangling-volumes.sh
@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+LOG_FILE="/var/log/docker-volumes-prune.log"
+echo "===== $(date '+%Y-%m-%d %H:%M:%S') =====" >> "$LOG_FILE"
 # "system" prune, because pruning images only leaves a lot of garbage around
-docker volume prune --force > /var/log/docker-volumes-prune.log 2>&1
+docker volume prune  --force >> "$LOG_FILE" 2>&1
+
+echo "" >> "$LOG_FILE"
 exit 0