diff --git a/pyproject.toml b/pyproject.toml
index c9abd461009..37f514c5a0c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 # When ESRP Release supports License-Expression, update flit_core to use >=3.2,<4
-requires = ["flit_core==3.10"]
+requires = ["flit_core==3.12.0"]
 build-backend = "flit_core.buildapi"
 
 [project]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index e27524bbb23..6a9df506bc2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -16,8 +16,8 @@ cryptography==48.0.0
 Deprecated==1.3.1
 dill==0.4.1
 docutils==0.23
-flit==3.10.0
-flit_core==3.10.0
+flit==3.12.0
+flit_core==3.12.0
 frozenlist==1.8.0
 h11==0.16.0
 h2==4.3.0