diff --git a/system/base/spidermonkey/actions.py b/system/base/spidermonkey/actions.py
index a64c0771..22497dd0 100644
--- a/system/base/spidermonkey/actions.py
+++ b/system/base/spidermonkey/actions.py
@@ -23,11 +23,11 @@ def setup():
    shelltools.cd("build-js")
 
    shelltools.system("../js/src/configure \
-	              --prefix=/usr \
-		      --libdir=/usr/lib \
-		      --enable-readline \
-		      --with-intl-api \
-		      --disable-debug \
+                      --prefix=/usr \
+                      --libdir=/usr/lib \
+                      --enable-readline \
+                      --with-intl-api \
+                      --disable-debug \
                       --disable-debug-symbols \
                       --disable-jemalloc \
                       --disable-strip  \
diff --git a/system/base/spidermonkey/pspec.xml b/system/base/spidermonkey/pspec.xml
index 5a05ad1c..5621fd21 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="9e8ed091437e8eed3807e40e7dd798db9f788dd2">https://ftp.mozilla.org/pub/firefox/releases/78.10.1esr/source/firefox-78.10.1esr.source.tar.xz</Archive>
+        <Archive type="tarxz" sha1sum="83ae378d8bddd9efc5badb99a6246979313f7134">https://ftp.mozilla.org/pub/firefox/releases/78.12.0esr/source/firefox-78.12.0esr.source.tar.xz</Archive>
         <BuildDependencies>
             <Dependency>python3-devel</Dependency>
             <Dependency>zlib-devel</Dependency>
@@ -60,6 +60,13 @@
     </Package>
 
     <History>
+        <Update release="12">
+            <Date>2021-08-07</Date>
+            <Version>78.12.0</Version>
+            <Comment>Version bump.</Comment>
+            <Name>Mustafa Cinasal</Name>
+            <Email>muscnsl@gmail.com</Email>
+        </Update>
         <Update release="11">
             <Date>2021-05-28</Date>
             <Version>78.10.1</Version>