diff --git a/changes/bug17906 b/changes/bug17906
new file mode 100644
index 0000000000..fff76d1c59
--- /dev/null
+++ b/changes/bug17906
@@ -0,0 +1,4 @@
+  o Minor features (authorities):
+    - Update the V3 identity key for dannenberg, it was changed on
+      18 November 2015.
+      Closes task #17906. Patch by "teor".
diff --git a/src/or/config.c b/src/or/config.c
index fde88ad680..1610cadf33 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -800,7 +800,7 @@ add_default_trusted_dir_authorities(dirinfo_type_t type)
       "v3ident=ED03BB616EB2F60BEC80151114BB25CEF515B226 "
       "131.188.40.189:80 F204 4413 DAC2 E02E 3D6B CF47 35A1 9BCA 1DE9 7281",
     "dannenberg orport=443 no-v2 "
-      "v3ident=585769C78764D58426B8B52B6651A5A71137189A "
+      "v3ident=0232AF901C31A04EE9848595AF9BB7620D4C5B2E "
       "193.23.244.244:80 7BE6 83E6 5D48 1413 21C5 ED92 F075 C553 64AC 7123",
     "urras orport=80 no-v2 v3ident=80550987E1D626E3EBA5E5E75A458DE0626D088C "
       "208.83.223.34:443 0AD3 FA88 4D18 F89E EA2D 89C0 1937 9E0E 7FD9 4417",