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-rw-r--r--docs/requirements-docs.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/requirements-docs.txt b/docs/requirements-docs.txt
index 981874fa..ca9c25cd 100644
--- a/docs/requirements-docs.txt
+++ b/docs/requirements-docs.txt
@@ -6,3 +6,4 @@ sphinxcontrib-seqdiag # BSD
sphinxcontrib-swaggerdoc
sphinxcontrib-spelling
sphinxcontrib-plantuml
+six