diff --git a/version.txt b/version.txt
new file mode 100644
index 000000000..49eb61482
--- /dev/null
+++ b/version.txt
@@ -0,0 +1 @@
+2026.4.13.6
diff --git a/welcome.py b/welcome.py
index bdb231cb4..95d9a04df 100644
--- a/welcome.py
+++ b/welcome.py
@@ -1,3 +1,8 @@
+import autolens as al
+from autoconf import check_version
+
+check_version(al.__version__)
+
 input(
     "############################################\n"
     "### WELCOME TO THE AUTOLENS WORKSPACE ###\n"