diff --git a/Makefile b/Makefile
index 3e341b0..3c946ab 100644
--- a/Makefile
+++ b/Makefile
@@ -34,7 +34,7 @@ GOFILES = \
 	acl.go \
 	group.go \
 	murmurdb.go \
-	json.go
+	freeze.go
 
 .PHONY: grumble
 grumble: pkg
diff --git a/json.go b/freeze.go
similarity index 97%
rename from json.go
rename to freeze.go
index bb3eaf2..7fa645c 100644
--- a/json.go
+++ b/freeze.go
@@ -1,9 +1,9 @@
 package main
 
 import (
-	"json"
+	"compress/gzip"
+	"gob"
 	"os"
-	"compress/zlib"
 )
 
 type frozenServer struct {
@@ -134,13 +134,13 @@ func NewServerFromFrozen(filename string) (s *Server, err os.Error) {
 	}
 	defer descFile.Close()
 
-	zr, err := zlib.NewReader(descFile)
+	zr, err := gzip.NewReader(descFile)
 	if err != nil {
 		return nil, err
 	}
 
 	fs := new(frozenServer)
-	decoder := json.NewDecoder(zr)
+	decoder := gob.NewDecoder(zr)
 	decoder.Decode(&fs)
 
 	s, err = NewServer(int64(fs.Id), "", int(DefaultPort+fs.Id-1))
diff --git a/grumble.go b/grumble.go
index f8fc743..ece3afe 100644
--- a/grumble.go
+++ b/grumble.go
@@ -5,13 +5,13 @@
 package main
 
 import (
+	"compress/gzip"
 	"flag"
 	"fmt"
+	"gob"
 	"os"
 	"log"
-	"json"
 	"sqlite"
-	"compress/zlib"
 	"path/filepath"
 )
 
@@ -61,14 +61,14 @@ func MurmurImport(filename string) (err os.Error) {
 			return
 		}
 
-		zf, err := zlib.NewWriterLevel(f, zlib.BestCompression)
+		zf, err := gzip.NewWriterLevel(f, gzip.BestCompression)
 
 		fz, err := m.Freeze()
 		if err != nil {
 			log.Fatalf("Unable to freeze server: %s", err.String())
 		}
 
-		enc := json.NewEncoder(zf)
+		enc := gob.NewEncoder(zf)
 		err = enc.Encode(fz)
 		if err != nil {
 			log.Printf("%s", err.String())