diff --git a/yadm b/yadm
index e57551f..56d6483 100755
--- a/yadm
+++ b/yadm
@@ -22,14 +22,14 @@ fi
 
 VERSION=1.12.0
 
-YADM_WORK="$HOME"
-YADM_DIR="$HOME/.yadm"
+YADM_WORK=${YADM_WORK:-"$HOME"}
+YADM_DIR=${YADM_DIR:-"$HOME/.yadm"}
 
-YADM_REPO="repo.git"
-YADM_CONFIG="config"
-YADM_ENCRYPT="encrypt"
-YADM_ARCHIVE="files.gpg"
-YADM_BOOTSTRAP="bootstrap"
+YADM_REPO=${YADM_REPO:-"repo.git"}
+YADM_CONFIG=${YADM_CONFIG:-"config"}
+YADM_ENCRYPT=${YADM_ENCRYPT:-"encrypt"}
+YADM_ARCHIVE=${YADM_ARCHIVE:-"files.gpg"}
+YADM_BOOTSTRAP=${YADM_BOOTSTRAP:-"bootstrap"}
 
 HOOK_COMMAND=""
 FULL_COMMAND=""