diff -up lxqt-session-1.2.0/lxqt-session/src/procreaper.cpp.omv~ lxqt-session-1.2.0/lxqt-session/src/procreaper.cpp
--- lxqt-session-1.2.0/lxqt-session/src/procreaper.cpp.omv~	2022-06-19 02:12:01.835293407 +0200
+++ lxqt-session-1.2.0/lxqt-session/src/procreaper.cpp	2022-06-19 02:29:22.297426001 +0200
@@ -29,7 +29,7 @@
 #include "log.h"
 #if defined(Q_OS_LINUX)
 #include <sys/prctl.h>
-#include <proc/readproc.h>
+#include <procps/pids.h>
 #elif defined(Q_OS_FREEBSD)
 #include <sys/procctl.h>
 #include <libutil.h>
@@ -109,16 +109,21 @@ void ProcReaper::stop(const std::set<int
     const pid_t my_pid = ::getpid();
     std::vector<pid_t> children;
 #if defined(Q_OS_LINUX)
-    PROCTAB * proc_dir = ::openproc(PROC_FILLSTAT);
-    while (proc_t * proc = ::readproc(proc_dir, nullptr))
+    struct pids_info *info = NULL;
+    enum pids_item items[] = { PIDS_ID_PPID, PIDS_ID_TGID };
+    enum rel_items { rel_ppid, rel_tgid };
+    struct pids_stack *stack;
+    procps_pids_new(&info, items, 2);
+    while ((stack = procps_pids_get(info, PIDS_FETCH_TASKS_ONLY)))
     {
-        if (proc->ppid == my_pid)
+        const int ppid = PIDS_VAL(rel_ppid, s_int, stack, info);
+        if (ppid == my_pid)
         {
-            children.push_back(proc->tgid);
+	    const int tgid = PIDS_VAL(rel_tgid, s_int, stack, info);
+            children.push_back(tgid);
         }
-        ::freeproc(proc);
     }
-    ::closeproc(proc_dir);
+    procps_pids_unref(&info);
 #elif defined(Q_OS_FREEBSD)
     int cnt = 0;
     if (kinfo_proc *proc_info = kinfo_getallproc(&cnt))
diff -up lxqt-session-1.2.0/CMakeLists.txt.omv~ lxqt-session-1.2.0/CMakeLists.txt
--- lxqt-session-1.2.0/CMakeLists.txt.omv~	2022-06-19 02:30:44.594909306 +0200
+++ lxqt-session-1.2.0/CMakeLists.txt	2022-06-19 02:30:49.965940879 +0200
@@ -35,7 +35,7 @@ find_package(X11 REQUIRED)
 message(STATUS "Building with Qt${Qt5Core_VERSION}")
 find_package(PkgConfig REQUIRED)
 if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-    pkg_search_module(PROCPS REQUIRED libprocps)
+    pkg_search_module(PROCPS REQUIRED libproc-2)
 endif()
 
 # Please don't move, must be after lxqt