diff --git a/lib.sh b/lib.sh
index 7c88180..4000bbe 100755
--- a/lib.sh
+++ b/lib.sh
@@ -22,7 +22,7 @@ function get_package_name_ver {
   IFS=\: read name ver <<< "${1}"
   # If version not found in the fully qualified package value.
   if test -z "${ver}"; then
-    ver="$(grep "Version:" <<< "$(apt show ${name})" | awk '{print $2}')"
+    ver="$(grep "Version:" <<< "$(apt-cache show ${name})" | awk '{print $2}')"
   fi
   echo "${name}" "${ver}"
 }
@@ -35,4 +35,4 @@ function write_manifest {
   # 0:-1 to remove trailing comma, delimit by newline and sort
   echo "${2:0:-1}" | tr ',' '\n' | sort > ${3}
   log "done."
-}
\ No newline at end of file
+}