diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 13a9745..77ad7b7 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -6,6 +6,10 @@ Fully Supported Platforms
 - Operating Systems: Ubuntu 16.04, 18.04, 20.04, 22.04, CentOS 7, Amazon Linux 2, Debian 11, RHEL 9, Rocky Linux 8
   Note: svr-info may work on other micro-architectures and Linux distributions, but has not been thoroughly tested
 
+2.9.1
+Bugs Fixed
+- Extremely long run time on some EMR virtual machines
+
 2.9.0
 Features Added
 - Report CPU temperature when CPUs have been active when '-benchmark turbo' is run
diff --git a/third_party/Makefile b/third_party/Makefile
index 9c835f4..c5dcc31 100644
--- a/third_party/Makefile
+++ b/third_party/Makefile
@@ -39,6 +39,7 @@ endif
 	tar -xf async-profiler-$(ASYNCPROFILER_VERSION)-linux-x64.tar.gz && mv async-profiler-$(ASYNCPROFILER_VERSION)-linux-x64 async-profiler
 endif
 
+# if you change the version, check the sed hacks below
 CPUID_VERSION := 20230614
 cpuid:
 ifeq ("$(wildcard cpuid)","")
@@ -49,6 +50,8 @@ endif
 endif	
 	# gcc 4.8 doesn't support -Wimplicit-fallthrough option
 	cd cpuid && sed -i s/"-Wimplicit-fallthrough"/""/ Makefile
+	# modifies one line to short-circuit output due to potential infinite loop on some systems
+	cd cpuid && sed -i 11242s/"(words\[WORD_EAX\] & 0xfff)"/0/ cpuid.c
 	cd cpuid && make
 
 dmidecode:
diff --git a/version.txt b/version.txt
index f3ac133..38d56e5 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.9.0
\ No newline at end of file
+2.9.1
\ No newline at end of file