diff --git a/CMakeLists.txt b/CMakeLists.txt
index e257be5..78f77a2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.8.0 FATAL_ERROR)
 # change version also in configure.ac
-project(gpujpeg VERSION 0.25.1 LANGUAGES C CUDA)
+project(gpujpeg VERSION 0.25.2 LANGUAGES C CUDA)
 
 # options
 set(BUILD_OPENGL OFF CACHE STRING "Build with OpenGL support, options are: AUTO ON OFF")
diff --git a/NEWS.md b/NEWS.md
index be6f29d..97fb87d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,10 @@
+2024-04-09 - 0.25.2
+----------
+- allowed setting subsampling 4:0:0 for color input image
+- allowed passing GPUJPEG_SUBSAMPLING_UNKNOWN to
+  gpujpeg_parameters_chroma_subsampling() to disable explicitly set
+  subsampling and return to implicit (automatic) one on the encoder
+
 2024-04-05 - 0.25.1
 ----------
 - added gpujpeg_default[_image]_parameters() functions returning the
diff --git a/configure.ac b/configure.ac
index e7f58fb..dc27927 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 AC_PREREQ([2.65])
 # change version also in CMakeLists.txt
-AC_INIT([libgpujpeg],[0.25.1],[https://github.com/CESNET/GPUJPEG/issues],[libgpujpeg],[https://github.com/CESNET/GPUJPEG])
+AC_INIT([libgpujpeg],[0.25.2],[https://github.com/CESNET/GPUJPEG/issues],[libgpujpeg],[https://github.com/CESNET/GPUJPEG])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR([src/main.c])
 AC_CONFIG_AUX_DIR([.])
diff --git a/src/gpujpeg_common.c b/src/gpujpeg_common.c
index d5ecebb..39a6ad9 100644
--- a/src/gpujpeg_common.c
+++ b/src/gpujpeg_common.c
@@ -300,7 +300,7 @@ gpujpeg_parameters_chroma_subsampling(struct gpujpeg_parameters* param,
         }
         param->comp_count += 1;
     }
-    GPUJPEG_ASSERT(param->comp_count >= 1 && "Invalid subsampling!");
+    GPUJPEG_ASSERT((subsampling == GPUJPEG_SUBSAMPLING_UNKNOWN || param->comp_count >= 1) && "Invalid subsampling!");
     for ( ; comp < GPUJPEG_MAX_COMPONENT_COUNT; ++comp ) {
         param->sampling_factor[comp].horizontal = 0;
         param->sampling_factor[comp].vertical = 0;