docs/requirements.txt: Add minimum version for Sphinx

ethereum · May 20, 2021 · 1ee64f4 · 1ee64f4
1 parent 22cc0ba
commit 1ee64f4
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/docs/requirements.txt b/docs/requirements.txt
@@ -1,3 +1,6 @@
 sphinx_rtd_theme>=0.3.1
 pygments-lexer-solidity>=0.7.0
 sphinx-a4doc>=1.2.1
+
+# Sphinx 2.1.0 is the oldest version that accepts a lexer class in add_lexer()
+sphinx>=2.1.0