diff --git a/src/target/adiv5_jtagdp.c b/src/target/adiv5_jtagdp.c
index cf8591b4..cd027d28 100644
--- a/src/target/adiv5_jtagdp.c
+++ b/src/target/adiv5_jtagdp.c
@@ -85,7 +85,7 @@ uint32_t fw_adiv5_jtagdp_low_access(ADIv5_DP_t *dp, uint8_t RnW,
 
 	jtag_dev_write_ir(&jtag_proc, dp->dp_jd_index, APnDP ? IR_APACC : IR_DPACC);
 
-	platform_timeout_set(&timeout, 20);
+	platform_timeout_set(&timeout, 250);
 	do {
 		jtag_dev_shift_dr(&jtag_proc, dp->dp_jd_index, (uint8_t*)&response,
 						  (uint8_t*)&request, 35);
diff --git a/src/target/adiv5_swdp.c b/src/target/adiv5_swdp.c
index 7797b8f9..1bfa2d9a 100644
--- a/src/target/adiv5_swdp.c
+++ b/src/target/adiv5_swdp.c
@@ -227,7 +227,7 @@ uint32_t firmware_swdp_low_access(ADIv5_DP_t *dp, uint8_t RnW,
 
 	if((addr & ADIV5_APnDP) && dp->fault) return 0;
 
-	platform_timeout_set(&timeout, 20);
+	platform_timeout_set(&timeout, 250);
 	do {
 		dp->seq_out(request, 8);
 		ack = dp->seq_in(3);