diff --git a/src/decoders/wat.rs b/src/decoders/wat.rs
index f9a9015..7e91fad 100644
--- a/src/decoders/wat.rs
+++ b/src/decoders/wat.rs
@@ -325,6 +325,18 @@ impl<'a> Parse<'a> for Instruction {
             parser.parse::<keyword::string_size>()?;
 
             Ok(Instruction::StringSize)
+        } else if lookahead.peek::<keyword::byte_array_lift_memory>() {
+            parser.parse::<keyword::byte_array_lift_memory>()?;
+
+            Ok(Instruction::ByteArrayLiftMemory)
+        } else if lookahead.peek::<keyword::byte_array_lower_memory>() {
+            parser.parse::<keyword::byte_array_lower_memory>()?;
+
+            Ok(Instruction::ByteArrayLowerMemory)
+        } else if lookahead.peek::<keyword::byte_array_size>() {
+            parser.parse::<keyword::byte_array_size>()?;
+
+            Ok(Instruction::ByteArraySize)
         } else if lookahead.peek::<keyword::record_lift>() {
             parser.parse::<keyword::record_lift>()?;
 
diff --git a/src/encoders/wat.rs b/src/encoders/wat.rs
index 66e1b60..33dfd53 100644
--- a/src/encoders/wat.rs
+++ b/src/encoders/wat.rs
@@ -73,7 +73,7 @@ impl ToString for &InterfaceType {
             InterfaceType::F32 => "f32".to_string(),
             InterfaceType::F64 => "f64".to_string(),
             InterfaceType::String => "string".to_string(),
-            InterfaceType::ByteArray => "byteArray".to_string(),
+            InterfaceType::ByteArray => "byte_array".to_string(),
             InterfaceType::Anyref => "anyref".to_string(),
             InterfaceType::I32 => "i32".to_string(),
             InterfaceType::I64 => "i64".to_string(),