diff --git a/.github/workflows/bootstrap.yml b/.github/workflows/bootstrap.yml
index a14844d..0ad5873 100644
--- a/.github/workflows/bootstrap.yml
+++ b/.github/workflows/bootstrap.yml
@@ -4,7 +4,7 @@ on:
   push:
 
 env:
-  CACHE_VERSION: 9
+  CACHE_VERSION: 0
   DEBIAN_FRONTEND: noninteractive
   PAWPAW_SKIP_TESTS: 1
 
diff --git a/bootstrap-common.sh b/bootstrap-common.sh
index 79a99cb..46b3c4f 100755
--- a/bootstrap-common.sh
+++ b/bootstrap-common.sh
@@ -425,7 +425,7 @@ fi # PAWPAW_SKIP_SAMPLERATE
 # zlib (skipped on macOS)
 
 if [ "${MACOS}" -eq 0 ]; then
-    git_clone zlib "${ZLIB_VERSION}" "${ZLIB_URL}"
+    download zlib "${ZLIB_VERSION}" "${ZLIB_URL}"
     build_conf zlib "${ZLIB_VERSION}" "--static --prefix=${PAWPAW_PREFIX} --zprefix"
 
     if [ "${CROSS_COMPILING}" -eq 0 ]; then
diff --git a/patches/opus/02_hidden-opus-api.patch b/patches/opus/02_hidden-opus-api.patch
index dd1f385..3e1815c 100644
--- a/patches/opus/02_hidden-opus-api.patch
+++ b/patches/opus/02_hidden-opus-api.patch
@@ -1,11 +1,13 @@
---- opus-static-1.3.1.orig/include/opus_defines.h
-+++ opus-static-1.3.1/include/opus_defines.h
+diff --git a/include/opus_defines.h b/include/opus_defines.h
+index cd8f4dd..48f59da 100644
+--- a/include/opus_defines.h
++++ b/include/opus_defines.h
 @@ -63,19 +63,7 @@ extern "C" {
  /** @cond OPUS_INTERNAL_DOC */
  /**Export control for opus functions */
  
 -#ifndef OPUS_EXPORT
--# if defined(WIN32)
+-# if defined(_WIN32)
 -#  if defined(OPUS_BUILD) && defined(DLL_EXPORT)
 -#   define OPUS_EXPORT __declspec(dllexport)
 -#  else
diff --git a/setup/versions.sh b/setup/versions.sh
index 6ec3d2b..841a00d 100644
--- a/setup/versions.sh
+++ b/setup/versions.sh
@@ -25,13 +25,13 @@ LIBOGG_URL=${XIPH_URL}/ogg
 LIBVORBIS_VERSION=1.3.7
 LIBVORBIS_URL=${XIPH_URL}/vorbis
 
-FLAC_VERSION=1.4.2
+FLAC_VERSION=1.4.3
 FLAC_URL=${XIPH_URL}/flac
 
-OPUS_VERSION=1.3.1
+OPUS_VERSION=1.5.1
 OPUS_URL=${XIPH_URL}/opus
 
-LIBSNDFILE_VERSION=1.1.0
+LIBSNDFILE_VERSION=1.2.2
 LIBSNDFILE_URL=https://github.com/libsndfile/libsndfile/releases/download/${LIBSNDFILE_VERSION}
 
 LIBSAMPLERATE_VERSION=0.1.9
@@ -40,8 +40,8 @@ LIBSAMPLERATE_URL=http://www.mega-nerd.com/SRC
 MINGW_STD_THREADS_VERSION=c931bac289dd431f1dd30fc4a5d1a7be36668073
 MINGW_STD_THREADS_URL=https://github.com/meganz/mingw-std-threads.git
 
-ZLIB_VERSION=cacf7f1d4e3d44d871b605da3b647f07d718623f # 1.2.11
-ZLIB_URL=https://github.com/madler/zlib.git
+ZLIB_VERSION=1.3.1
+ZLIB_URL=https://github.com/madler/zlib/releases/download/v${ZLIB_VERSION}
 
 # ---------------------------------------------------------------------------------------------------------------------
 # bootstrap plugins