diff --git a/cmake/Modules/Packages/ML-PACE.cmake b/cmake/Modules/Packages/ML-PACE.cmake
index 6cdb751617..30aa433a58 100644
--- a/cmake/Modules/Packages/ML-PACE.cmake
+++ b/cmake/Modules/Packages/ML-PACE.cmake
@@ -1,6 +1,6 @@
-set(PACELIB_URL "https://github.com/ICAMS/lammps-user-pace/archive/refs/tags/v.2023.01.3.fix.tar.gz" CACHE STRING "URL for PACE evaluator library sources")
+set(PACELIB_URL "https://github.com/ICAMS/lammps-user-pace/archive/refs/tags/v.2023.10.04.pre.tar.gz" CACHE STRING "URL for PACE evaluator library sources")
 
-set(PACELIB_MD5 "4f0b3b5b14456fe9a73b447de3765caa" CACHE STRING "MD5 checksum of PACE evaluator library tarball")
+set(PACELIB_MD5 "61ba11a37ee00de8365b18b521d394a6" CACHE STRING "MD5 checksum of PACE evaluator library tarball")
 mark_as_advanced(PACELIB_URL)
 mark_as_advanced(PACELIB_MD5)
 GetFallbackURL(PACELIB_URL PACELIB_FALLBACK)
diff --git a/lib/pace/Install.py b/lib/pace/Install.py
index 4f3cf299ac..2a8cd2f1f3 100644
--- a/lib/pace/Install.py
+++ b/lib/pace/Install.py
@@ -18,11 +18,11 @@ from install_helpers import fullpath, geturl, checkmd5sum, getfallback
 # settings
 
 thisdir = fullpath('.')
-version ='v.2023.01.3.fix'
+version ='v.2023.10.04.pre'
 
 # known checksums for different PACE versions. used to validate the download.
 checksums = { \
-    'v.2023.01.3.fix': '4f0b3b5b14456fe9a73b447de3765caa'
+    'v.2023.10.04.pre': '61ba11a37ee00de8365b18b521d394a6'
 }
 
 parser = ArgumentParser(prog='Install.py', description="LAMMPS library build wrapper script")