diff --git a/thread_pthread.c b/thread_pthread.c
index 97879f559a..134d1875cb 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1759,6 +1759,7 @@ ubf_timer_disarm(void)
 #if UBF_TIMER == UBF_TIMER_POSIX
     rb_atomic_t prev;
 
+    if (timer_posix.owner && timer_posix.owner != getpid()) return;
     prev = ATOMIC_CAS(timer_posix.state, RTIMER_ARMED, RTIMER_DISARM);
     switch (prev) {
       case RTIMER_DISARM: return; /* likely */
diff --git a/version.h b/version.h
index 237cc5824e..ce64675c70 100644
--- a/version.h
+++ b/version.h
@@ -12,11 +12,11 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 2
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 95
+#define RUBY_PATCHLEVEL 96
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 6
-#define RUBY_RELEASE_DAY 3
+#define RUBY_RELEASE_DAY 10
 
 #include "ruby/version.h"