diff --git a/crates/servicepoint_binding_cs/ServicePoint/BitVec.cs b/crates/servicepoint_binding_cs/ServicePoint/BitVec.cs
index 9afdb28..fe01947 100644
--- a/crates/servicepoint_binding_cs/ServicePoint/BitVec.cs
+++ b/crates/servicepoint_binding_cs/ServicePoint/BitVec.cs
@@ -2,7 +2,7 @@ namespace ServicePoint;
 
 public sealed partial class BitVec
 {
-    public static BitVec Load(Span<byte> bytes)
+    public static BitVec Load(ReadOnlySpan<byte> bytes)
     {
         unsafe
         {
diff --git a/crates/servicepoint_binding_cs/ServicePoint/Bitmap.cs b/crates/servicepoint_binding_cs/ServicePoint/Bitmap.cs
index 07f63d8..72e1152 100644
--- a/crates/servicepoint_binding_cs/ServicePoint/Bitmap.cs
+++ b/crates/servicepoint_binding_cs/ServicePoint/Bitmap.cs
@@ -2,7 +2,7 @@ namespace ServicePoint;
 
 public sealed partial class Bitmap
 {
-    public static Bitmap Load(nuint width, nuint height, Span<byte> bytes)
+    public static Bitmap Load(nuint width, nuint height, ReadOnlySpan<byte> bytes)
     {
         unsafe
         {
diff --git a/crates/servicepoint_binding_cs/ServicePoint/BrightnessGrid.cs b/crates/servicepoint_binding_cs/ServicePoint/BrightnessGrid.cs
index fdca652..15eb20a 100644
--- a/crates/servicepoint_binding_cs/ServicePoint/BrightnessGrid.cs
+++ b/crates/servicepoint_binding_cs/ServicePoint/BrightnessGrid.cs
@@ -2,7 +2,7 @@ namespace ServicePoint;
 
 public sealed partial class BrightnessGrid
 {
-    public static BrightnessGrid Load(nuint width, nuint height, Span<byte> bytes)
+    public static BrightnessGrid Load(nuint width, nuint height, ReadOnlySpan<byte> bytes)
     {
         unsafe
         {
diff --git a/crates/servicepoint_binding_cs/ServicePoint/Cp437Grid.cs b/crates/servicepoint_binding_cs/ServicePoint/Cp437Grid.cs
index 16a70e2..f86e470 100644
--- a/crates/servicepoint_binding_cs/ServicePoint/Cp437Grid.cs
+++ b/crates/servicepoint_binding_cs/ServicePoint/Cp437Grid.cs
@@ -4,7 +4,7 @@ namespace ServicePoint;
 
 public sealed partial class Cp437Grid
 {
-    public static Cp437Grid Load(nuint width, nuint height, Span<byte> bytes)
+    public static Cp437Grid Load(nuint width, nuint height, ReadOnlySpan<byte> bytes)
     {
         unsafe
         {
diff --git a/crates/servicepoint_binding_cs/ServicePoint/Packet.cs b/crates/servicepoint_binding_cs/ServicePoint/Packet.cs
index 7946921..c885853 100644
--- a/crates/servicepoint_binding_cs/ServicePoint/Packet.cs
+++ b/crates/servicepoint_binding_cs/ServicePoint/Packet.cs
@@ -4,7 +4,7 @@ namespace ServicePoint;
 
 public sealed partial class Packet
 {
-    public static bool TryLoad(Span<byte> bytes, [MaybeNullWhen(false)] out Packet packet)
+    public static bool TryLoad(ReadOnlySpan<byte> bytes, [MaybeNullWhen(false)] out Packet packet)
     {
         unsafe
         {