diff --git a/fastcache.go b/fastcache.go
index 8a3268e..460824a 100644
--- a/fastcache.go
+++ b/fastcache.go
@@ -68,7 +68,13 @@ type Options struct {
 	// Cache based on uri+querystring.
 	IncludeQueryString bool
 
+	// Compression options.
 	Compression CompressionsOptions
+
+	// QueryArgsTransformerHook is a hook that can be used to transform the query string
+	// before it is used to generate the cache key. This can be used to selectively
+	// include / exclude query parameters from the cache key.
+	QueryArgsTransformerHook func(*fasthttp.Args)
 }
 
 // Item represents the cache entry for a single endpoint with the actual cache
@@ -126,14 +132,7 @@ func (f *FastCache) Cached(h fastglue.FastRequestHandler, o *Options, group stri
 			o.Compression.MinLength = 500
 		}
 
-		var hash [16]byte
-		// If IncludeQueryString option is set then cache based on uri + md5(query_string)
-		if o.IncludeQueryString {
-			hash = md5.Sum(r.RequestCtx.URI().FullURI())
-		} else {
-			hash = md5.Sum(r.RequestCtx.URI().Path())
-		}
-		uri := hex.EncodeToString(hash[:])
+		uri := f.makeURI(r, o)
 
 		// Fetch etag + cached bytes from the store.
 		blob, err := f.s.Get(namespace, group, uri)
@@ -245,6 +244,44 @@ func (f *FastCache) DelGroup(namespace string, group ...string) error {
 	return f.s.DelGroup(namespace, group...)
 }
 
+func (f *FastCache) makeURI(r *fastglue.Request, o *Options) string {
+	var hash [16]byte
+
+	// lexicographically sort the query string.
+	r.RequestCtx.QueryArgs().Sort(func(x, y []byte) int {
+		return bytes.Compare(x, y)
+	})
+
+	// If IncludeQueryString option is set then cache based on uri + md5(query_string)
+	if o.IncludeQueryString {
+		id := r.RequestCtx.URI().FullURI()
+
+		// Check if we need to include only specific query params.
+		if o.QueryArgsTransformerHook != nil {
+			// Acquire a copy so as to not modify the request.
+			uriRaw := fasthttp.AcquireURI()
+			r.RequestCtx.URI().CopyTo(uriRaw)
+
+			q := uriRaw.QueryArgs()
+
+			// Call the hook to transform the query string.
+			o.QueryArgsTransformerHook(q)
+
+			// Get the new URI.
+			id = uriRaw.FullURI()
+
+			// Release the borrowed URI.
+			fasthttp.ReleaseURI(uriRaw)
+		}
+
+		hash = md5.Sum(id)
+	} else {
+		hash = md5.Sum(r.RequestCtx.URI().Path())
+	}
+
+	return hex.EncodeToString(hash[:])
+}
+
 // cache caches a response body.
 func (f *FastCache) cache(r *fastglue.Request, namespace, group string, o *Options) error {
 	// ETag?.
@@ -258,14 +295,7 @@ func (f *FastCache) cache(r *fastglue.Request, namespace, group string, o *Optio
 	}
 
 	// Write cache to the store (etag, content type, response body).
-	var hash [16]byte
-	// If IncludeQueryString option is set then cache based on uri + md5(query_string)
-	if o.IncludeQueryString {
-		hash = md5.Sum(r.RequestCtx.URI().FullURI())
-	} else {
-		hash = md5.Sum(r.RequestCtx.URI().Path())
-	}
-	uri := hex.EncodeToString(hash[:])
+	uri := f.makeURI(r, o)
 
 	var blob []byte
 	if !o.NoBlob {
diff --git a/fastcache_test.go b/fastcache_test.go
index d2d2248..53b489c 100644
--- a/fastcache_test.go
+++ b/fastcache_test.go
@@ -3,6 +3,7 @@ package fastcache_test
 import (
 	"bytes"
 	"compress/gzip"
+	"fmt"
 	"io"
 	"log"
 	"net/http"
@@ -70,6 +71,49 @@ func init() {
 			Logger:       log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile),
 		}
 
+		includeQS = &fastcache.Options{
+			NamespaceKey:       namespaceKey,
+			ETag:               true,
+			TTL:                time.Second * 5,
+			Logger:             log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile),
+			IncludeQueryString: true,
+		}
+
+		includeQSNoEtag = &fastcache.Options{
+			NamespaceKey:       namespaceKey,
+			ETag:               false,
+			TTL:                time.Second * 5,
+			Logger:             log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile),
+			IncludeQueryString: true,
+		}
+
+		includeQSSpecific = &fastcache.Options{
+			NamespaceKey:       namespaceKey,
+			ETag:               true,
+			TTL:                time.Second * 5,
+			Logger:             log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile),
+			IncludeQueryString: true,
+			QueryArgsTransformerHook: func(args *fasthttp.Args) {
+				// Copy the keys to delete, and delete them later. This is to
+				// avoid borking the VisitAll() iterator.
+				mp := map[string]struct{}{
+					"foo": {},
+				}
+
+				delKeys := [][]byte{}
+				args.VisitAll(func(k, v []byte) {
+					if _, ok := mp[string(k)]; !ok {
+						delKeys = append(delKeys, k)
+					}
+				})
+
+				// Delete the keys.
+				for _, k := range delKeys {
+					args.DelBytes(k)
+				}
+			},
+		}
+
 		fc = fastcache.New(cachestore.New("CACHE:", redis.NewClient(&redis.Options{
 			Addr: rd.Addr(),
 		})))
@@ -102,6 +146,19 @@ func init() {
 		return r.SendBytes(200, "text/plain", content)
 	}, cfgDefault, group))
 
+	srv.GET("/include-qs", fc.Cached(func(r *fastglue.Request) error {
+		return r.SendBytes(200, "text/plain", content)
+	}, includeQS, group))
+
+	srv.GET("/include-qs-no-etag", fc.Cached(func(r *fastglue.Request) error {
+		out := time.Now()
+		return r.SendBytes(200, "text/plain", []byte(fmt.Sprintf("%v", out)))
+	}, includeQSNoEtag, group))
+
+	srv.GET("/include-qs-specific", fc.Cached(func(r *fastglue.Request) error {
+		return r.SendBytes(200, "text/plain", content)
+	}, includeQSSpecific, group))
+
 	// Start the server
 	go func() {
 		s := &fasthttp.Server{
@@ -177,6 +234,7 @@ func TestCache(t *testing.T) {
 	if r.StatusCode != 200 {
 		t.Fatalf("expected 200 but got %v", r.StatusCode)
 	}
+
 	r, b = getReq(srvRoot+"/cached", r.Header.Get("Etag"), false, t)
 	if r.StatusCode != 200 {
 		t.Fatalf("expected 200 but got '%v'", r.StatusCode)
@@ -213,6 +271,103 @@ func TestCache(t *testing.T) {
 	}
 }
 
+func TestQueryString(t *testing.T) {
+	// First request should be 200.
+	r, b := getReq(srvRoot+"/include-qs?foo=bar", "", false, t)
+	if r.StatusCode != 200 {
+		t.Fatalf("expected 200 but got %v", r.StatusCode)
+	}
+
+	if !bytes.Equal(b, content) {
+		t.Fatalf("expected 'ok' in body but got %v", b)
+	}
+
+	// Second should be 304.
+	r, _ = getReq(srvRoot+"/include-qs?foo=bar", r.Header.Get("Etag"), false, t)
+	if r.StatusCode != 304 {
+		t.Fatalf("expected 304 but got '%v'", r.StatusCode)
+	}
+}
+
+func TestQueryStringLexicographical(t *testing.T) {
+	// First request should be 200.
+	r, b := getReq(srvRoot+"/include-qs?foo=bar&baz=qux", "", false, t)
+	if r.StatusCode != 200 {
+		t.Fatalf("expected 200 but got %v", r.StatusCode)
+	}
+
+	if !bytes.Equal(b, content) {
+		t.Fatalf("expected 'ok' in body but got %v", b)
+	}
+
+	// Second should be 304.
+	r, _ = getReq(srvRoot+"/include-qs?baz=qux&foo=bar", r.Header.Get("Etag"), false, t)
+	if r.StatusCode != 304 {
+		t.Fatalf("expected 304 but got '%v'", r.StatusCode)
+	}
+}
+
+func TestQueryStringWithoutEtag(t *testing.T) {
+	// First request should be 200.
+	r, b := getReq(srvRoot+"/include-qs-no-etag?foo=bar", "", false, t)
+	if r.StatusCode != 200 {
+		t.Fatalf("expected 200 but got %v", r.StatusCode)
+	}
+
+	// Second should be 200 but with same response.
+	r2, b2 := getReq(srvRoot+"/include-qs-no-etag?foo=bar", "", false, t)
+	if r2.StatusCode != 200 {
+		t.Fatalf("expected 200 but got '%v'", r2.StatusCode)
+	}
+
+	if !bytes.Equal(b, b2) {
+		t.Fatalf("expected '%v' in body but got %v", b, b2)
+	}
+
+	// Third should be 200 but with different response.
+	r3, b3 := getReq(srvRoot+"/include-qs-no-etag?foo=baz", "", false, t)
+	if r3.StatusCode != 200 {
+		t.Fatalf("expected 200 but got '%v'", r3.StatusCode)
+	}
+
+	// time should be different
+	if bytes.Equal(b, b3) {
+		t.Fatalf("expected both to be different (should not be %v), but got %v", b, b3)
+	}
+}
+
+func TestQueryStringSpecific(t *testing.T) {
+	// First request should be 200.
+	r1, b := getReq(srvRoot+"/include-qs-specific?foo=bar&baz=qux", "", false, t)
+	if r1.StatusCode != 200 {
+		t.Fatalf("expected 200 but got %v", r1.StatusCode)
+	}
+	if !bytes.Equal(b, content) {
+		t.Fatalf("expected 'ok' in body but got %v", b)
+	}
+
+	// Second should be 304.
+	r, _ := getReq(srvRoot+"/include-qs-specific?foo=bar&baz=qux", r1.Header.Get("Etag"), false, t)
+	if r.StatusCode != 304 {
+		t.Fatalf("expected 304 but got '%v'", r.StatusCode)
+	}
+
+	// Third should be 304 as foo=bar
+	r, _ = getReq(srvRoot+"/include-qs-specific?loo=mar&foo=bar&baz=qux&quux=quuz", r1.Header.Get("Etag"), false, t)
+	if r.StatusCode != 304 {
+		t.Fatalf("expected 304 but got '%v'", r.StatusCode)
+	}
+
+	// Fourth should be 200 as foo=rab
+	r, b = getReq(srvRoot+"/include-qs-specific?foo=rab&baz=qux&quux=quuz", r1.Header.Get("Etag"), false, t)
+	if r.StatusCode != 200 {
+		t.Fatalf("expected 200 but got '%v'", r.StatusCode)
+	}
+	if !bytes.Equal(b, content) {
+		t.Fatalf("expected 'ok' in body but got %v", b)
+	}
+}
+
 func TestNoCache(t *testing.T) {
 	// All requests should return 200.
 	for n := 0; n < 3; n++ {
diff --git a/stores/goredis/redis.go b/stores/goredis/redis.go
index 5da0da2..baff0cc 100644
--- a/stores/goredis/redis.go
+++ b/stores/goredis/redis.go
@@ -57,6 +57,7 @@ func (s *Store) Get(namespace, group, uri string) (fastcache.Item, error) {
 	var (
 		out fastcache.Item
 	)
+
 	// Get content_type, etag, blob in that order.
 	cmd := s.cn.HMGet(s.ctx, s.key(namespace, group), s.field(keyCtype, uri), s.field(keyEtag, uri), s.field(keyCompression, uri), s.field(keyBlob, uri))
 	if err := cmd.Err(); err != nil {