diff --git a/docs/conf.py b/docs/conf.py
index c0008be029b6..c84ad222f432 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -239,7 +239,7 @@ def generate_r_docs(app):
         -c conda-forge \
         -n r_env \
             cmake=3.18.2=ha30ef3c_0 \
-            r-base=4.0.3=hc603457_2 \
+            r-base=4.0.3=ha43b4e8_3 \
             r-data.table=1.13.2=r40h0eb13af_0 \
             r-jsonlite=1.7.1=r40hcdcec82_0 \
             r-matrix=1.2_18=r40h7fa42b6_3 \