diff --git a/CMakeLists.txt b/CMakeLists.txt
index 097ae709..1faf6bc2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,7 +50,7 @@ else()
     include(FetchContent)
     FetchContent_Declare(blosc2
         GIT_REPOSITORY https://github.com/Blosc/c-blosc2
-        GIT_TAG 5a2b0ed9c4d801230c118fbc5811817055b5a3f5  # v2.22.0
+        GIT_TAG 011c9e537f28299c536294d842e1a3d0e41db24f  # openzl_plugin + miniexpr
     )
     FetchContent_MakeAvailable(blosc2)
     include_directories("${blosc2_SOURCE_DIR}/include")
diff --git a/src/blosc2/__init__.py b/src/blosc2/__init__.py
index 12a2a908..e2107a65 100644
--- a/src/blosc2/__init__.py
+++ b/src/blosc2/__init__.py
@@ -59,6 +59,8 @@ class Codec(Enum):
     OPENHTJ2K = 36
     #: Needs to be installed with ``pip install blosc2-grok``
     GROK = 37
+    #: Needs to be installed with ``pip install blosc2-openzl``
+    OPENZL = 38
 
 
 class Filter(Enum):
diff --git a/src/blosc2/blosc2_ext.pyx b/src/blosc2/blosc2_ext.pyx
index 91276883..0856ca9c 100644
--- a/src/blosc2/blosc2_ext.pyx
+++ b/src/blosc2/blosc2_ext.pyx
@@ -26,7 +26,7 @@ from cpython cimport (
 from cpython.pycapsule cimport PyCapsule_GetPointer, PyCapsule_New
 from cython.operator cimport dereference
 from libc.stdint cimport uintptr_t
-from libc.stdlib cimport free, malloc, realloc
+from libc.stdlib cimport free, malloc, realloc, calloc
 from libc.stdlib cimport abs as c_abs
 from libc.string cimport memcpy, strcpy, strdup, strlen
 from libcpp cimport bool as c_bool
@@ -206,6 +206,7 @@ cdef extern from "blosc2.h":
         uint8_t* ttmp
         size_t ttmp_nbytes
         blosc2_context* ctx
+        c_bool output_is_disposable
 
     ctypedef struct blosc2_postfilter_params:
         void *user_data
@@ -252,6 +253,7 @@ cdef extern from "blosc2.h":
         void* schunk
         blosc2_postfilter_fn postfilter
         blosc2_postfilter_params *postparams
+        int32_t typesize
 
     cdef const blosc2_dparams BLOSC2_DPARAMS_DEFAULTS
 
@@ -888,6 +890,7 @@ cdef create_dparams_from_kwargs(blosc2_dparams *dparams, kwargs, blosc2_cparams*
     dparams.postparams = NULL
     # TODO: support the next ones in the future
     #dparams.schunk = kwargs.get('schunk', blosc2.dparams_dflts['schunk'])
+    #dparams.typesize = typesize = kwargs.get('typesize', blosc2.dparams_dflts['typesize'])
     _check_dparams(dparams, cparams)
 
 def decompress2(src, dst=None, **kwargs):
@@ -1616,7 +1619,7 @@ cdef class SChunk:
         cdef blosc2_cparams* cparams = self.schunk.storage.cparams
         cparams.prefilter = <blosc2_prefilter_fn> general_filler
 
-        cdef blosc2_prefilter_params* preparams = <blosc2_prefilter_params *> malloc(sizeof(blosc2_prefilter_params))
+        cdef blosc2_prefilter_params* preparams = <blosc2_prefilter_params *> calloc(1, sizeof(blosc2_prefilter_params))
         cdef filler_udata* fill_udata = <filler_udata *> malloc(sizeof(filler_udata))
         fill_udata.py_func = <char *> malloc(strlen(func_id) + 1)
         strcpy(fill_udata.py_func, func_id)
@@ -1649,7 +1652,7 @@ cdef class SChunk:
 
         cdef blosc2_cparams* cparams = self.schunk.storage.cparams
         cparams.prefilter = <blosc2_prefilter_fn> general_prefilter
-        cdef blosc2_prefilter_params* preparams = <blosc2_prefilter_params *> malloc(sizeof(blosc2_prefilter_params))
+        cdef blosc2_prefilter_params* preparams = <blosc2_prefilter_params *> calloc(1, sizeof(blosc2_prefilter_params))
         cdef user_filters_udata* pref_udata = <user_filters_udata*> malloc(sizeof(user_filters_udata))
         pref_udata.py_func = <char *> malloc(strlen(func_id) + 1)
         strcpy(pref_udata.py_func, func_id)