diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 990bf0ac..92f2838d 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -13,7 +13,7 @@ honggfuzz_fuzz = ["honggfuzz"]
 
 [dependencies]
 honggfuzz = { version = "0.5", optional = true }
-afl = { version = "0.3", optional = true }
+afl = { version = "0.4", optional = true }
 bitcoin = { path = "..", features = ["fuzztarget", "serde-decimal"] }
 
 # Prevent this from interfering with workspaces
diff --git a/fuzz/fuzz_targets/deserialize_address.rs b/fuzz/fuzz_targets/deserialize_address.rs
index 9bb71fe6..4a26a20c 100644
--- a/fuzz/fuzz_targets/deserialize_address.rs
+++ b/fuzz/fuzz_targets/deserialize_address.rs
@@ -10,10 +10,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }
diff --git a/fuzz/fuzz_targets/deserialize_block.rs b/fuzz/fuzz_targets/deserialize_block.rs
index cb314ad0..f9364f4a 100644
--- a/fuzz/fuzz_targets/deserialize_block.rs
+++ b/fuzz/fuzz_targets/deserialize_block.rs
@@ -5,10 +5,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }
diff --git a/fuzz/fuzz_targets/deserialize_decimal.rs b/fuzz/fuzz_targets/deserialize_decimal.rs
index 002bb760..78e3c605 100644
--- a/fuzz/fuzz_targets/deserialize_decimal.rs
+++ b/fuzz/fuzz_targets/deserialize_decimal.rs
@@ -14,10 +14,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }
diff --git a/fuzz/fuzz_targets/deserialize_script.rs b/fuzz/fuzz_targets/deserialize_script.rs
index 0d10d1a2..8bf7ab19 100644
--- a/fuzz/fuzz_targets/deserialize_script.rs
+++ b/fuzz/fuzz_targets/deserialize_script.rs
@@ -36,10 +36,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }
diff --git a/fuzz/fuzz_targets/deserialize_transaction.rs b/fuzz/fuzz_targets/deserialize_transaction.rs
index 505606c3..7df5ffd0 100644
--- a/fuzz/fuzz_targets/deserialize_transaction.rs
+++ b/fuzz/fuzz_targets/deserialize_transaction.rs
@@ -17,10 +17,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }
diff --git a/fuzz/fuzz_targets/deserialize_udecimal.rs b/fuzz/fuzz_targets/deserialize_udecimal.rs
index 558b1e31..1451ad2b 100644
--- a/fuzz/fuzz_targets/deserialize_udecimal.rs
+++ b/fuzz/fuzz_targets/deserialize_udecimal.rs
@@ -14,10 +14,10 @@ fn do_test(data: &[u8]) {
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-    afl::read_stdio_bytes(|data| {
+    fuzz!(|data| {
         do_test(&data);
     });
 }