diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 495e0056..24c97c02 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -1317,6 +1317,10 @@ function play(tid, is_ev, seek, call_depth) {
 			import_js('/.cpr/deps/ogv.js', function () {
 				toast.hide();
 				play(tid, false, seek, 1);
+
+				var m = /.* Version\/([0-9]+)\.[0-9\.]+ Mobile\/[^ ]+ Safari\/[0-9\.]+$/.exec(navigator.userAgent);
+				if (m && parseInt(m[1]) < 14)
+					toast.err(0, 'because this is an apple device,\nsafari 14 or newer is required\n\nyou are using safari version ' + m[1] + ', so playback of ogg/vorbis/opus files will be buggy\n\nnote: every iOS browser is safari');
 			});
 
 			return;
diff --git a/scripts/deps-docker/Dockerfile b/scripts/deps-docker/Dockerfile
index 29156555..f9105b18 100644
--- a/scripts/deps-docker/Dockerfile
+++ b/scripts/deps-docker/Dockerfile
@@ -3,7 +3,7 @@ WORKDIR /z
 ENV     ver_asmcrypto=5b994303a9d3e27e0915f72a10b6c2c51535a4dc \
         ver_hashwasm=4.7.0 \
         ver_marked=1.1.0 \
-        ver_ogvjs=1.8.0 \
+        ver_ogvjs=1.8.4 \
         ver_mde=2.14.0 \
         ver_codemirror=5.59.3 \
         ver_fontawesome=5.13.0 \
@@ -74,23 +74,16 @@ RUN     cd hash-wasm \
 # build ogvjs
 RUN     cd ogvjs-$ver_ogvjs \
         && cp -pv \
-            ogv.js \
             ogv-worker-audio.js \
             ogv-demuxer-ogg-wasm.js \
             ogv-demuxer-ogg-wasm.wasm \
-            ogv-demuxer-webm-wasm.js \
-            ogv-demuxer-webm-wasm.wasm \
             ogv-decoder-audio-opus-wasm.js \
             ogv-decoder-audio-opus-wasm.wasm \
             ogv-decoder-audio-vorbis-wasm.js \
             ogv-decoder-audio-vorbis-wasm.wasm \
-            /z/dist
-
-#            ogv-demuxer-ogg.js \
-#            ogv-demuxer-webm.js \
-#            ogv-decoder-audio-opus.js \
-#            ogv-decoder-audio-vorbis.js \
-#            dynamicaudio.swf \
+            /z/dist \
+        && cp -pv \
+            ogv-es2017.js /z/dist/ogv.js
 
 
 # build marked
diff --git a/scripts/deps-docker/zopfli.makefile b/scripts/deps-docker/zopfli.makefile
index c6a2ac0a..ddb623d3 100644
--- a/scripts/deps-docker/zopfli.makefile
+++ b/scripts/deps-docker/zopfli.makefile
@@ -2,7 +2,7 @@ all: $(addsuffix .gz, $(wildcard *.*))
 
 %.gz: %
 	#brotli -q 11 $<
-	pigz -11 -J 34 -I 573 $<
+	pigz -11 -I 573 $<
 
 # pigz -11 -J 34 -I 100 -F < $< > $@.first