diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index 8fd6dc447a06..1fe61eb6bb67 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -11,7 +11,7 @@
 
 stdenv.mkDerivation rec {
   pname = "dovecot";
-  version = "2.3.16";
+  version = "2.3.17";
 
   nativeBuildInputs = [ perl pkg-config ];
   buildInputs =
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://dovecot.org/releases/${lib.versions.majorMinor version}/${pname}-${version}.tar.gz";
-    sha256 = "04ngqv5mml5z0i4p7fkchp4xw2awy7x7mq2mim9frnav0m9iv9q3";
+    sha256 = "1y9dpn4jgzrfjibp5zrc11bdk0q843d998kxhpxkyfm2fz6i4i12";
   };
 
   enableParallelBuilding = true;
diff --git a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
index a13a7c104197..6665abe96934 100644
--- a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
+++ b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
@@ -3,11 +3,11 @@ let
   dovecotMajorMinor = lib.versions.majorMinor dovecot.version;
 in stdenv.mkDerivation rec {
   pname = "dovecot-pigeonhole";
-  version = "0.5.16";
+  version = "0.5.17";
 
   src = fetchurl {
     url = "https://pigeonhole.dovecot.org/releases/${dovecotMajorMinor}/dovecot-${dovecotMajorMinor}-pigeonhole-${version}.tar.gz";
-    sha256 = "0f79qsiqnhaxn7mrrfcrnsjyv6357kzb7wa0chhfd69vwa06g8sw";
+    sha256 = "0j6ng173hh5iiqxdkxfb5v9djpn39gxdrv5ki7i22cf5cqwq47h3";
   };
 
   buildInputs = [ dovecot openssl ];