diff --git a/openocd/interface_jlink.cfg b/openocd/interface_jlink.cfg
index c3c62f6..b1b595e 100644
--- a/openocd/interface_jlink.cfg
+++ b/openocd/interface_jlink.cfg
@@ -1,3 +1,4 @@
 source [find interface/jlink.cfg]
+adapter speed 500
 transport select swd
 source [find target/stm32h7x.cfg]
diff --git a/openocd/interface_stlink.cfg b/openocd/interface_stlink.cfg
index 5023c6c..abbfdd7 100644
--- a/openocd/interface_stlink.cfg
+++ b/openocd/interface_stlink.cfg
@@ -1,4 +1,5 @@
 source [find interface/stlink.cfg]
+adapter speed 500
 transport select hla_swd
 source [find target/stm32h7x.cfg]