diff --git a/gen_libs.sh b/gen_libs.sh
index bdf83d6..28f31b2 100755
--- a/gen_libs.sh
+++ b/gen_libs.sh
@@ -3,7 +3,7 @@ set -e
 
 echo -n "Downloading header-only libraries..."
 mkdir deps
-wget https://github.com/nlohmann/json/releases/download/v3.1.2/json.hpp -O deps/json.hpp 2> /dev/null
+wget https://github.com/nlohmann/json/releases/download/v3.1.1/json.hpp -O deps/json.hpp 2> /dev/null
 wget https://github.com/mpark/variant/releases/download/v1.3.0/variant.hpp -O deps/variant.hpp 2> /dev/null
 echo " Done."
 
diff --git a/sources b/sources
index df984bc..48b70f0 100644
--- a/sources
+++ b/sources
@@ -1,4 +1,4 @@
-SHA512 (header_only.tar.gz) = 6ce0b8740e690d196f0dfddeb8c2a93c2185e702ba574a606ab26e10c26f3a3aa421497489b3dcb3696e45aa4c5869eb9628493962179018e70ef05963c532ad
+SHA512 (header_only.tar.gz) = 96cb007d70b764f3a6d022cf55dd415061b4d310a0f318e080fe4df8891e4b880e9eb524161ac977be0086d017190b7d62aa79617f1329ae775c6c8d43adefc5
 SHA512 (lmdbxx-0b43ca8.tar.gz) = 025a945288a398b09549c91c98509a57912f8614c14b476e7c8d4fb0dc8fc1288fa1b3a33567cccea474277a1c48b3701f2df31e8a6acc851eb9549a9822f074
 SHA512 (matrix-structs-850100c.tar.gz) = 0cd10c865528ed5c5d80c889b7d9fc315796e12b69476696f7e10e745a7774c2a5866fc6de0a10b43ef4de2fb71bf3211899f7c68fa354ae013e28647decc899
 SHA512 (nheko-0.2.1.tar.gz) = 7d08c5c561c0388756b663da98b209c3074b61f5743cefa8f1ad21e3184b0de3973a8a6b129a0f1f602e6dbb3c99d7f0cf47e394a4c9527086a250aff7ca5b85