diff --git a/pkgs/development/tools/database/timescaledb-tune/default.nix b/pkgs/development/tools/database/timescaledb-tune/default.nix
index 9c24d35cbf88..be29a0457ee0 100644
--- a/pkgs/development/tools/database/timescaledb-tune/default.nix
+++ b/pkgs/development/tools/database/timescaledb-tune/default.nix
@@ -2,17 +2,20 @@
 
 buildGoModule rec {
   pname = "timescaledb-tune";
-  version = "0.11.2";
+  version = "0.12.0";
 
   src = fetchFromGitHub {
     owner = "timescale";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-6xMdOqLfD3NQksmcD7rlTW3xoW2Fi6OmwbpjIj9A/tw=";
+    sha256 = "sha256-p1SU0wnB2XftuPMbm47EbJ2aZGV9amlk0y7FI0QOBkk=";
   };
 
   vendorSha256 = "sha256-n2jrg9FiR/gSrbds/QVV8Duf7BTEs36yYi4F3Ve+d0E=";
 
+  # Temporary fix of bug: https://github.com/timescale/timescaledb-tune/issues/95
+  patches = [ ./fixMinMaxConn.diff ];
+
   meta = with lib; {
     description = "A tool for tuning your TimescaleDB for better performance";
     homepage = "https://github.com/timescale/timescaledb-tune";
diff --git a/pkgs/development/tools/database/timescaledb-tune/fixMinMaxConn.diff b/pkgs/development/tools/database/timescaledb-tune/fixMinMaxConn.diff
new file mode 100644
index 000000000000..3a0110476cce
--- /dev/null
+++ b/pkgs/development/tools/database/timescaledb-tune/fixMinMaxConn.diff
@@ -0,0 +1,13 @@
+diff --git a/pkg/pgtune/misc.go b/pkg/pgtune/misc.go
+index 1fceb6e..3e76be5 100644
+--- a/pkg/pgtune/misc.go
++++ b/pkg/pgtune/misc.go
+@@ -35,7 +35,7 @@ const (
+ 	// If you want to lower this value, consider that Patroni will not accept anything less than 25 as
+ 	// a valid max_connections and will replace it with 100, per
+ 	// https://github.com/zalando/patroni/blob/00cc62726d6df25d31f9b0baa082c83cd3f7bef9/patroni/postgresql/config.py#L280
+-	minMaxConns = 25
++	minMaxConns = 20
+ )
+ 
+ // MaxConnectionsDefault is the recommended default value for max_connections.