diff --git a/conda/bld.bat b/conda/bld.bat
index ab90ee3..664ad44 100644
--- a/conda/bld.bat
+++ b/conda/bld.bat
@@ -8,8 +8,8 @@ mkdir %SRC_DIR%\thirdparty
 
 cd %SRC_DIR%\thirdparty
 
-git clone --branch 9.1.0 --depth 1 https://github.com/fmtlib/fmt.git
-git clone --branch v1.10.0 --depth 1 https://github.com/gabime/spdlog.git
+git clone --branch 10.2.1 --depth 1 https://github.com/fmtlib/fmt.git
+git clone --branch v1.13.0 --depth 1 https://github.com/gabime/spdlog.git
 git clone --branch v4.0.0 --depth 1 https://github.com/Microsoft/GSL.git
 git clone --branch v3.0.1 --depth 1 https://github.com/HowardHinnant/date