diff --git a/device/main/linux-purism-librem5/APKBUILD b/device/main/linux-purism-librem5/APKBUILD
index 586afdd3c..f4e5e8f31 100644
--- a/device/main/linux-purism-librem5/APKBUILD
+++ b/device/main/linux-purism-librem5/APKBUILD
@@ -84,5 +84,5 @@ package() {
 
 sha512sums="
 053419a2e22bfd4748a5e228c7495b37074603a1fba14594c8640e391203055c80e0228e32c7281a25664193b98f50a837c5503194a47e8a236fddd3b49f30b0  linux-purism-librem5-6.3.1pureos1.tar.gz
-a652445ef91e695c71cf0a8742aa2d03a5fbe2fd986eb3fd63fe9b1ddc2d0c4a5f97ef7d1e3228caa69ec5473c5af118ff07a6e4937f7c087371357bc9a02618  config-purism-librem5.aarch64
+2754acf73a3d1a0294cf84e5768027d036f5a65fb42b2cf3c114cddeadd4dec449cbb205fa6cae1646a49ea819dd90a79a532cab54e900755ee5270c584e3d5f  config-purism-librem5.aarch64
 "
diff --git a/device/main/linux-purism-librem5/config-purism-librem5.aarch64 b/device/main/linux-purism-librem5/config-purism-librem5.aarch64
index ca7c46007..db993eeec 100644
--- a/device/main/linux-purism-librem5/config-purism-librem5.aarch64
+++ b/device/main/linux-purism-librem5/config-purism-librem5.aarch64
@@ -133,15 +133,25 @@ CONFIG_CPU_ISOLATION=y
 #
 CONFIG_TREE_RCU=y
 CONFIG_PREEMPT_RCU=y
-# CONFIG_RCU_EXPERT is not set
+CONFIG_RCU_EXPERT=y
 CONFIG_SRCU=y
 CONFIG_TREE_SRCU=y
 CONFIG_TASKS_RCU_GENERIC=y
+# CONFIG_FORCE_TASKS_RCU is not set
 CONFIG_TASKS_RCU=y
+# CONFIG_FORCE_TASKS_RUDE_RCU is not set
 CONFIG_TASKS_RUDE_RCU=y
+# CONFIG_FORCE_TASKS_TRACE_RCU is not set
 CONFIG_TASKS_TRACE_RCU=y
 CONFIG_RCU_STALL_COMMON=y
 CONFIG_RCU_NEED_SEGCBLIST=y
+CONFIG_RCU_FANOUT=64
+CONFIG_RCU_FANOUT_LEAF=16
+# CONFIG_RCU_BOOST is not set
+CONFIG_RCU_NOCB_CPU=y
+# CONFIG_RCU_NOCB_CPU_DEFAULT_ALL is not set
+# CONFIG_TASKS_TRACE_RCU_READ_MB is not set
+CONFIG_RCU_LAZY=y
 # end of RCU Subsystem
 
 CONFIG_IKCONFIG=y