diff --git a/.gitmodules b/.gitmodules
index b6a5c5824b8..6c8de2fce64 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -366,3 +366,6 @@
 [submodule "contrib/idna"]
 	path = contrib/idna
 	url = https://github.com/ada-url/idna.git
+[submodule "contrib/double-conversion"]
+	path = contrib/double-conversion
+	url = https://github.com/ClickHouse/double-conversion.git
diff --git a/contrib/double-conversion b/contrib/double-conversion
new file mode 160000
index 00000000000..cf2f0f3d547
--- /dev/null
+++ b/contrib/double-conversion
@@ -0,0 +1 @@
+Subproject commit cf2f0f3d547dc73b4612028a155b80536902ba02