diff --git a/nongnu/packages/mozilla.scm b/nongnu/packages/mozilla.scm
index 85040f0..d685851 100644
--- a/nongnu/packages/mozilla.scm
+++ b/nongnu/packages/mozilla.scm
@@ -233,19 +233,19 @@ according to Unicode Standard Annex #31")
 
 ;; Update this id with every firefox update to it's release date.
 ;; It's used for cache validation and therefor can lead to strange bugs.
-(define %firefox-esr-build-id "20221213000000")
+(define %firefox-esr-build-id "20230117000000")
 
 (define-public firefox-esr
   (package
     (name "firefox-esr")
-    (version "102.6.0esr")
+    (version "102.7.0esr")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://archive.mozilla.org/pub/firefox/releases/"
                            version "/source/firefox-" version ".source.tar.xz"))
        (sha256
-        (base32 "1zhggzrk7lgip8jm37idh22qks76kmjy4yqy2qi63mvnv2j58cfj"))))
+        (base32 "1ahl66x8chnsz80capqa5ivyrqhc50s91zrcgz1jxd7w2ws61957"))))
     (build-system gnu-build-system)
     (arguments
      (list