diff --git a/system/base/spidermonkey/actions.py b/system/base/spidermonkey/actions.py
index 22497dd0..3c215e7e 100644
--- a/system/base/spidermonkey/actions.py
+++ b/system/base/spidermonkey/actions.py
@@ -22,7 +22,7 @@ def setup():
    shelltools.system("mkdir -p build-js")
    shelltools.cd("build-js")
 
-   shelltools.system("../js/src/configure \
+   shelltools.system("sh ../js/src/configure.in \
                       --prefix=/usr \
                       --libdir=/usr/lib \
                       --enable-readline \
diff --git a/system/base/spidermonkey/files/mozjs78-fix-soname.patch b/system/base/spidermonkey/files/mozjs78-fix-soname.patch
index 546157fc..10afaec3 100644
--- a/system/base/spidermonkey/files/mozjs78-fix-soname.patch
+++ b/system/base/spidermonkey/files/mozjs78-fix-soname.patch
@@ -10,13 +10,29 @@
  ifeq ($(OS_ARCH),Darwin)
  	install_name_tool -id $(abspath $(libdir)/$(SHARED_LIBRARY)) $(DESTDIR)$(libdir)/$(SHARED_LIBRARY)
  endif
---- a/js/src/build/moz.build
-+++ b/js/src/build/moz.build
-@@ -25,6 +25,7 @@
- if CONFIG['JS_SHARED_LIBRARY']:
-     GeckoSharedLibrary('js', linkage=None)
-     SHARED_LIBRARY_NAME = CONFIG['JS_LIBRARY_NAME']
+--- a/js/src/build/moz.build	2022-03-13 17:31:39.000000000 +0300
++++ b/js/src/build/moz.build	2022-03-21 23:32:34.252893769 +0300
+@@ -26,6 +26,7 @@
+ if CONFIG["JS_SHARED_LIBRARY"]:
+     GeckoSharedLibrary("js", linkage=None)
+     SHARED_LIBRARY_NAME = CONFIG["JS_LIBRARY_NAME"]
 +    LDFLAGS += ['-Wl,-soname,lib{}.so.0'.format(SHARED_LIBRARY_NAME)]
 
      # Ensure symbol versions of shared library on Linux do not conflict
-     # with those in libxul.
\ No newline at end of file
+     # with those in libxul.
+diff --git a/config/rules.mk b/config/rules.mk
+index 0f9b2ac..f6b4efe 100644
+--- a/config/rules.mk
++++ b/config/rules.mk
+@@ -285,6 +285,8 @@ ifeq ($(OS_ARCH),GNU)
+ OS_CPPFLAGS += -DPATH_MAX=1024 -DMAXPATHLEN=1024
+ endif
+
++EXTRA_DSO_LDOPTS += -Wl,-soname,lib$(JS_LIBRARY_NAME).so.0
++
+ #
+ # MINGW32
+ #
+--
+2.31.1
+
diff --git a/system/base/spidermonkey/pspec.xml b/system/base/spidermonkey/pspec.xml
index 5621fd21..185c6af8 100644
--- a/system/base/spidermonkey/pspec.xml
+++ b/system/base/spidermonkey/pspec.xml
@@ -12,7 +12,7 @@
         <IsA>library</IsA>
         <Summary>Stand-alone JavaScript C Library</Summary>
         <Description>Spidermonkey is Mozilla's C implementation of JavaScript.</Description>
-        <Archive type="tarxz" sha1sum="83ae378d8bddd9efc5badb99a6246979313f7134">https://ftp.mozilla.org/pub/firefox/releases/78.12.0esr/source/firefox-78.12.0esr.source.tar.xz</Archive>
+        <Archive type="tarxz" sha1sum="6d889a16bf839da5a809e2d0c75426abbb62801d">https://ftp.mozilla.org/pub/firefox/releases/91.9.1esr/source/firefox-91.9.1esr.source.tar.xz</Archive>
         <BuildDependencies>
             <Dependency>python3-devel</Dependency>
             <Dependency>zlib-devel</Dependency>
@@ -23,7 +23,7 @@
             <Dependency>llvm</Dependency>
         </BuildDependencies>
         <Patches>
-            <Patch level="1">mozjs78-silence-sandbox-violations.patch</Patch>
+<!--             <Patch level="1">mozjs78-silence-sandbox-violations.patch</Patch> -->
             <Patch level="1">mozjs78-fix-soname.patch</Patch>
             <!--Patch level="1">Remove-unused-LLVM-and-Rust-build-dependencies.patch</Patch-->
         </Patches>
@@ -60,6 +60,13 @@
     </Package>
 
     <History>
+        <Update release="13">
+            <Date>2022-06-01</Date>
+            <Version>91.9.1</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="12">
             <Date>2021-08-07</Date>
             <Version>78.12.0</Version>