diff --git a/.changeset/nice-boats-wonder.md b/.changeset/nice-boats-wonder.md
new file mode 100644
index 0000000000..434cde841e
--- /dev/null
+++ b/.changeset/nice-boats-wonder.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs-node': patch
+---
+
+Allow usage of custom tags with sequence node type (such as the !ENV tag) in the techdocs mkdocs config.