diff --git a/sim_specs/c4_alone_200.txt b/sim_specs/c4_alone_200.txt
index 7eb36bc..3278fc0 100644
--- a/sim_specs/c4_alone_200.txt
+++ b/sim_specs/c4_alone_200.txt
@@ -2,7 +2,7 @@ main_cc_algo: c4
 main_start_time: 0
 main_scenario_text: =b1:*1:397:20000000;
 nb_connections: 1
-main_target_time: 1310000
+main_target_time: 1400000
 data_rate_in_gbps: 0.2
 latency: 20000
 queue_delay_max: 80000
diff --git a/sim_specs/c4_ecn.txt b/sim_specs/c4_ecn.txt
index ee0c251..1751167 100644
--- a/sim_specs/c4_ecn.txt
+++ b/sim_specs/c4_ecn.txt
@@ -2,7 +2,7 @@ main_cc_algo: c4
 main_start_time: 0
 main_scenario_text: =b1:*1:397:10000000;
 nb_connections: 1
-main_target_time: 5000000
+main_target_time: 4500000
 data_rate_in_gbps: 0.02
 latency: 40000
 l4s_max: 15000
diff --git a/sim_specs/c4_ecn_bbr.txt b/sim_specs/c4_ecn_bbr.txt
index f7dc2b7..9790841 100644
--- a/sim_specs/c4_ecn_bbr.txt
+++ b/sim_specs/c4_ecn_bbr.txt
@@ -3,7 +3,7 @@ main_start_time: 0
 main_scenario_text: =b1:*1:397:10000000;
 nb_connections: 2
 main_start_time: 1000000
-main_target_time: 15500000
+main_target_time: 14000000
 background_cc_algo: bbr
 background_start_time: 0
 background_scenario_text: =b1:*1:397:20000000;
diff --git a/sim_specs/c4_ecn_c4.txt b/sim_specs/c4_ecn_c4.txt
index c291789..2536519 100644
--- a/sim_specs/c4_ecn_c4.txt
+++ b/sim_specs/c4_ecn_c4.txt
@@ -3,7 +3,7 @@ main_start_time: 0
 main_scenario_text: =b1:*1:397:10000000;
 nb_connections: 2
 main_start_time: 1000000
-main_target_time: 15600000
+main_target_time: 13500000
 background_cc_algo: c4
 background_start_time: 0
 background_scenario_text: =b1:*1:397:20000000;
diff --git a/sim_specs/c4_ecn_cubic.txt b/sim_specs/c4_ecn_cubic.txt
index 5583d3e..fb9eefc 100644
--- a/sim_specs/c4_ecn_cubic.txt
+++ b/sim_specs/c4_ecn_cubic.txt
@@ -3,7 +3,7 @@ main_start_time: 0
 main_scenario_text: =b1:*1:397:10000000;
 nb_connections: 2
 main_start_time: 1000000
-main_target_time: 7000000
+main_target_time: 12500000
 background_cc_algo: cubic
 background_start_time: 0
 background_scenario_text: =b1:*1:397:20000000;
diff --git a/sim_specs/c4_wifi_bad_c4.txt b/sim_specs/c4_wifi_bad_c4.txt
index 5428c2d..1961417 100644
--- a/sim_specs/c4_wifi_bad_c4.txt
+++ b/sim_specs/c4_wifi_bad_c4.txt
@@ -6,7 +6,7 @@ nb_connections: 2
 background_cc_algo: c4
 background_start_time: 0
 background_scenario_text: =b1:*1:397:10000000;
-main_target_time: 11000000
+main_target_time: 12000000
 data_rate_in_gbps: 0.01
 latency: 1000
 jitter: 7000