diff --git a/.github/workflows/build_test.yaml b/.github/workflows/build_test.yaml
index df82d53..abea762 100644
--- a/.github/workflows/build_test.yaml
+++ b/.github/workflows/build_test.yaml
@@ -10,13 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        debian_version: [bullseye]
+        debian_version: [bullseye, bookworm]
         docker_arch: [amd64, arm32v7, arm64v8]
         build_type: [generic, raspi]
         exclude:
           - docker_arch: amd64
             build_type: raspi
-          - debian_version: buster
+          - debian_version: bookworm
             build_type: raspi
     steps:
     - name: Checkout
diff --git a/Makefile b/Makefile
index ed6b107..3c301e6 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,10 @@ GIT_REVISION ?= $(shell git rev-parse --short HEAD)
 CFLAGS := -Werror -Wall -g -I$(CURDIR) -D_GNU_SOURCE
 LDLIBS := -lpthread -lstdc++
 
+# libdatachannel deprecations on bookworm
+# error: 'HMAC_Init_ex' is deprecated: Since OpenSSL 3.0
+CFLAGS += -Wno-error=deprecated-declarations
+
 ifneq (x,x$(shell which ccache))
 CCACHE ?= ccache
 endif
diff --git a/util/ffmpeg/remuxer.c b/util/ffmpeg/remuxer.c
index fb1b141..76b8c56 100644
--- a/util/ffmpeg/remuxer.c
+++ b/util/ffmpeg/remuxer.c
@@ -94,7 +94,12 @@ int ffmpeg_remuxer_open(ffmpeg_remuxer_t *remuxer)
   if (remuxer->packet)
     return 0;
 
-  AVInputFormat *input_format = av_find_input_format(remuxer->input_format);
+#if LIBAVFORMAT_VERSION_MAJOR < 59
+  AVInputFormat *input_format;
+#else
+  const AVInputFormat *input_format;
+#endif
+  input_format = av_find_input_format(remuxer->input_format);
   if (!input_format)
     return AVERROR(EINVAL);