diff --git a/.github/workflows/fuzz.yml b/.github/workflows/fuzz.yml
index 72465588..f67f25c9 100644
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -53,6 +53,7 @@ hashes_sha1,
           override: true
           profile: minimal
       - name: fuzz
+        run: if [[ "${{ matrix.fuzz_target }}" =~ ^bitcoin ]]; then export RUSTFLAGS='--cfg=hashes_fuzz --cfg=secp256k1_fuzz'; fi
         run: cd fuzz && ./fuzz.sh "${{ matrix.fuzz_target }}"
       - run: echo "${{ matrix.fuzz_target }}" >executed_${{ matrix.fuzz_target }}
       - uses: actions/upload-artifact@v2
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index 9ca4340d..8728202c 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -9,7 +9,7 @@ publish = false
 cargo-fuzz = true
 
 [dependencies]
-honggfuzz = { version = "0.5", default-features = false }
+honggfuzz = { version = "0.5.55", default-features = false }
 bitcoin = { version = "0.30.0", features = [ "serde" ] }
 
 serde = { version = "1.0.103", features = [ "derive" ] }
diff --git a/fuzz/generate-files.sh b/fuzz/generate-files.sh
index 46b3a6a1..acb598c8 100755
--- a/fuzz/generate-files.sh
+++ b/fuzz/generate-files.sh
@@ -20,7 +20,7 @@ publish = false
 cargo-fuzz = true
 
 [dependencies]
-honggfuzz = { version = "0.5", default-features = false }
+honggfuzz = { version = "0.5.55", default-features = false }
 bitcoin = { version = "0.30.0", features = [ "serde" ] }
 
 serde = { version = "1.0.103", features = [ "derive" ] }
@@ -78,6 +78,7 @@ $(for name in $(listTargetNames); do echo "$name,"; done)
           override: true
           profile: minimal
       - name: fuzz
+        run: if [[ "\${{ matrix.fuzz_target }}" =~ ^bitcoin ]]; then export RUSTFLAGS='--cfg=hashes_fuzz --cfg=secp256k1_fuzz'; fi
         run: cd fuzz && ./fuzz.sh "\${{ matrix.fuzz_target }}"
       - run: echo "\${{ matrix.fuzz_target }}" >executed_\${{ matrix.fuzz_target }}
       - uses: actions/upload-artifact@v2