diff --git a/pkg/libb2/Makefile b/pkg/libb2/Makefile
index 4a4d2a98bb..775e0d1f99 100644
--- a/pkg/libb2/Makefile
+++ b/pkg/libb2/Makefile
@@ -1,6 +1,6 @@
 PKG_NAME    = libb2
 PKG_URL     = https://github.com/BLAKE2/libb2
-PKG_VERSION = 60ea749837362c226e8501718f505ab138e5c19d # v0.98
+PKG_VERSION = 2c5142f12a2cd52f3ee0a43e50a3a76f75badf85 # v0.98.1
 PKG_LICENSE = CC0-1.0
 
 include $(RIOTBASE)/pkg/pkg.mk
diff --git a/pkg/libb2/Makefile.dep b/pkg/libb2/Makefile.dep
new file mode 100644
index 0000000000..ce65b9fe18
--- /dev/null
+++ b/pkg/libb2/Makefile.dep
@@ -0,0 +1,2 @@
+# 8bit architectures are not supported by libb2.
+FEATURES_BLACKLIST += arch_8bit
diff --git a/pkg/libb2/include/libb2_config.h b/pkg/libb2/include/libb2_config.h
index 025e093d68..6f00116c9c 100644
--- a/pkg/libb2/include/libb2_config.h
+++ b/pkg/libb2/include/libb2_config.h
@@ -15,10 +15,6 @@ extern "C" {
 #define NATIVE_LITTLE_ENDIAN
 #endif
 
-#ifndef CPU_HAS_UNALIGNED_ACCESS
-#define HAVE_ALIGNED_ACCESS_REQUIRED
-#endif
-
 #ifdef __cplusplus
 }
 #endif