diff --git a/examples/03_data_features/000_matchings.py b/examples/03_data_features/000_matchings.py
index 7447d6ab..5fcf3aef 100644
--- a/examples/03_data_features/000_matchings.py
+++ b/examples/03_data_features/000_matchings.py
@@ -138,12 +138,5 @@
 # For example, the gene expressions retrieved from the Allen atlas are linked by the coordinate
 # For example, the gene expressions retrieved from the Allen atlas are linked by the coordinate
 # of their tissue probes in MNI space. If a coordinate is inside the selected brain regions, it is an exact match.
-#
-# .. warning::
-#     The service "web API of the Allen Brain Atlas for the human microarray expression"
-#     is not available at the moment, therefore siibra is not able to fetch
-#     gene expression features. This is a known issue which we are investigating:
-#     https://github.com/FZJ-INM1-BDA/siibra-python/issues/636.
-#
 features = siibra.features.get(v1, siibra.features.molecular.GeneExpressions, gene="TAC1")
 print(features[0].last_match_description)
diff --git a/examples/03_data_features/004_gene_expressions.py b/examples/03_data_features/004_gene_expressions.py
index 256b0808..897ff618 100644
--- a/examples/03_data_features/004_gene_expressions.py
+++ b/examples/03_data_features/004_gene_expressions.py
@@ -17,12 +17,6 @@
 Gene expressions
 ~~~~~~~~~~~~~~~~
 
-.. warning::
-    The service "web API of the Allen Brain Atlas for the human microarray expression"
-    is not available at the moment, therefore siibra is not able to fetch
-    gene expression features. This is a known issue which we are investigating:
-    https://github.com/FZJ-INM1-BDA/siibra-python/issues/636.
-
 ``siibra`` can query gene expression data from the Allen brain atlas. The gene
 expressions are linked to atlas regions by coordinates of their probes in MNI
 space. When querying feature by a region,  ``siibra`` automatically builds a