diff --git a/docs/examples/classic.md b/docs/examples/classic.md
index ac9a73a..02f5c36 100644
--- a/docs/examples/classic.md
+++ b/docs/examples/classic.md
@@ -1,7 +1,7 @@
 # The "Classic"
 
 This example is equivalent to the one in the
-[DDL in BNF for HDF5](https://portal.hdfgroup.org/display/HDF5/DDL+in+BNF+for+HDF5-1.12+and+above) page of the HDF5 documentation.
+[DDL in BNF for HDF5](https://support.hdfgroup.org/documentation/hdf5/latest/_d_d_l_b_n_f114.html) page of the HDF5 documentation.
 
 ```{literalinclude} classic.json
 :language: json