diff --git a/av1an/encoder/aom.py b/av1an/encoder/aom.py
index c010fd0..63a517d 100644
--- a/av1an/encoder/aom.py
+++ b/av1an/encoder/aom.py
@@ -16,7 +16,7 @@ class Aom(Encoder):
             encoder_help='aomenc --help',
             default_args=['--threads=8', '--cpu-used=6', '--end-usage=q', '--cq-level=30', '--tile-columns=2', '--tile-rows=1'],
             default_passes=2,
-            default_q_range=(15, 35),
+            default_q_range=(15, 55),
             output_extension='ivf'
         )
 
diff --git a/av1an/encoder/svtav1.py b/av1an/encoder/svtav1.py
index fa6c5b7..6153f7e 100644
--- a/av1an/encoder/svtav1.py
+++ b/av1an/encoder/svtav1.py
@@ -16,7 +16,7 @@ class SvtAv1(Encoder):
             encoder_help='SvtAv1EncApp --help',
             default_args=['--preset', '4', '--rc', '0', '--qp', '25'],
             default_passes=1,
-            default_q_range=(15, 35),
+            default_q_range=(15, 50),
             output_extension='ivf'
         )
 
diff --git a/av1an/encoder/svtvp9.py b/av1an/encoder/svtvp9.py
index 25bc3c7..6418652 100644
--- a/av1an/encoder/svtvp9.py
+++ b/av1an/encoder/svtvp9.py
@@ -15,7 +15,7 @@ class SvtVp9(Encoder):
             encoder_help='SvtVp9EncApp --help',
             default_args=None,
             default_passes=1,
-            default_q_range=(15, 35),
+            default_q_range=(15, 55),
             output_extension='ivf'
         )
 
diff --git a/av1an/encoder/vpx.py b/av1an/encoder/vpx.py
index 6ea6e1b..d50e58d 100644
--- a/av1an/encoder/vpx.py
+++ b/av1an/encoder/vpx.py
@@ -17,7 +17,7 @@ class Vpx(Encoder):
             default_args=['--codec=vp9', '-b', '10', '--profile=2', '--threads=4', '--cpu-used=0', '--end-usage=q',
                           '--cq-level=30', '--row-mt=1'],
             default_passes=2,
-            default_q_range=(15, 35),
+            default_q_range=(15, 55),
             output_extension='ivf'
         )
 
diff --git a/av1an/encoder/vvc.py b/av1an/encoder/vvc.py
index 4689527..40037c8 100644
--- a/av1an/encoder/vvc.py
+++ b/av1an/encoder/vvc.py
@@ -26,7 +26,7 @@ class Vvc(Encoder):
             encoder_help='vvc_encoder --help',
             default_args=None,
             default_passes=1,
-            default_q_range=(15, 35),
+            default_q_range=(15, 50),
             output_extension='h266'
         )