diff --git a/bootstrap.sh b/bootstrap.sh
index 52393d4..150f36e 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -367,6 +367,16 @@
 	EOF
 }
 
+install_reclass()
+{
+  VERSION=${1:-$RECLASS_VERSION}
+  VERSION=${VERSION:-master}
+  # tries to replace all local version system version
+  for s in $(python -c "import site; print(' '.join(site.getsitepackages()))"); do
+    pip install --upgrade --force-reinstall -I \
+    -t "$s" git+https://github.com/salt-formulas/reclass.git@${VERSION};
+  done
+}
 
 install_salt_master_pkg()
 {
@@ -571,6 +581,11 @@
         fi
     }
 
+    if [[ $RECLASS_VERSION =~ ^(dev|devel|master)$ ]]; then
+      log_warn "Install development version of reclass from master branch"
+      install_reclass ${RECLASS_VERSION/dev*/master}
+    fi
+
     log_info "Re/starting salt services"
     pgrep salt-master | sed /$$/d | xargs --no-run-if-empty -i{} $SUDO kill -9 {}
     pkill -9 salt-minion