diff --git a/fix_missing_dates.sh b/fix_missing_dates.sh
index 0721829..1fa7ed8 100644
--- a/fix_missing_dates.sh
+++ b/fix_missing_dates.sh
@@ -1,12 +1,14 @@
-#!/bin/bash
+#/usr/bin/env bash
+BASEDIR=$(dirname "$0")
+
 current=$(date "+%Y")
 for ((year=1900; year<=current; year=year+1))
 do
-  grep "/$year/" README.md | grep -v "($year)" | grep -v " - (" | while read -r line
+  grep "/$year/" "$BASEDIR/README.md" | grep -v "($year)" | grep -v " - (" | while read -r line
   do
     echo "$line"
     replace=$(echo "$line" | sed "s/) - /) - ($year) /g" | sed -e "s#\*#\\\*#g" | sed -e "s#\[#\\\[#g" | sed -e "s#\]#\\\]#g" | sed -e "s#/#\\\/#g")
     orig=$(echo "$line" | sed -e "s#/#\\\/#g" | sed -e "s#\*#\\\*#g" |  sed -e "s#\[#\\\[#g" | sed -e "s#\]#\\\]#g" )
-    sed -i.bak "s;$orig;$replace;g" README.md
+    sed -i.bak "s;$orig;$replace;g" "$BASEDIR/README.md"
   done
 done