diff --git a/README.md b/README.md
index d6da439..e36cff3 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Previews http://repo.quamolit.org/phlox/ .
 [![Clojars Project](https://img.shields.io/clojars/v/quamolit/phlox.svg)](https://clojars.org/quamolit/phlox)
 
 ```edn
-[quamolit/phlox "0.1.7-a3"]
+[quamolit/phlox "0.1.7-a4"]
 ```
 
 `render!` to add canvas to `<body/>`:
diff --git a/calcit.cirru b/calcit.cirru
index 2e826f5..f81a508 100644
--- a/calcit.cirru
+++ b/calcit.cirru
@@ -6013,15 +6013,16 @@
                       |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583038537146) (:text |vector+) (:id |VZgKdBSU)
                       |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583038538580)
                         :data $ {}
-                          |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583038539062) (:text |or) (:id |o9eIu0Ju)
-                          |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583038539302)
+                          |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049504000) (:text |any+) (:id |o9eIu0Ju)
+                          |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049504366)
                             :data $ {}
-                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583038540314) (:text |number+) (:id |Dxx1H9Cck)
-                            :id |70w4GnFZF
-                          |b $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583038543345)
-                            :data $ {}
-                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583038547164) (:text |keyword+) (:id |TE9f6abq)
-                            :id |Aofo_7vte
+                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049504663) (:text |{}) (:id |SI_cNhqY)
+                              |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049504934)
+                                :data $ {}
+                                  |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049505896) (:text |:some?) (:id |X0Kk49U2l)
+                                  |j $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049506446) (:text |true) (:id |PhOIn8EJO)
+                                :id |jec8BB7sf
+                            :id |b6MCw93vg
                         :id |-weI7zhef
                     :id |lkkSz_T0Q
                 :id |7NOI_I3e
@@ -8248,22 +8249,23 @@
                 :data $ {}
                   |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |dev-check) (:id |REA6ZwiAR)
                   |j $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |cursor) (:id |asTuPcxhl)
-                  |r $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583043081994)
+                  |r $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049512191)
                     :data $ {}
-                      |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |vector+) (:id |LVbaXwpdD)
-                      |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583043081994)
+                      |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049512191) (:text |vector+) (:id |YOvbKpthf)
+                      |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049512191)
                         :data $ {}
-                          |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |or) (:id |dttEvh0oa)
-                          |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583043081994)
+                          |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049512191) (:text |any+) (:id |7vilOuXBK)
+                          |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049512191)
                             :data $ {}
-                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |keyword+) (:id |GLdVuZTPd)
-                            :id |z46uy4IKP
-                          |r $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583043081994)
-                            :data $ {}
-                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583043081994) (:text |number+) (:id |-oOn2EjlY)
-                            :id |jxthMb0Zu
-                        :id |-w1XmFwUc
-                    :id |vRykbnZf8
+                              |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049512191) (:text |{}) (:id |JE6TAOPEy)
+                              |j $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583049512191)
+                                :data $ {}
+                                  |T $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049512191) (:text |:some?) (:id |Fdd2lnXqx)
+                                  |j $ {} (:type :leaf) (:by |rJG4IHzWf) (:at 1583049512191) (:text |true) (:id |8zJUgdSU6)
+                                :id |A1lOGClBg
+                            :id |g_9isA5TX
+                        :id |jNsW6_ml6
+                    :id |FlzvUVhQ6
                 :id |mEOhe_b9u
               |u $ {} (:type :expr) (:by |rJG4IHzWf) (:at 1583043089620)
                 :data $ {}
diff --git a/pom.xml b/pom.xml
index 0d5b927..6c0d1fd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>quamolit</groupId>
   <artifactId>phlox</artifactId>
-  <version>0.1.7-a3</version>
+  <version>0.1.7-a4</version>
   <name>phlox</name>
 
   <url>https://github.com/Quamolit/phlox</url>
diff --git a/src/phlox/comp/drag_point.cljs b/src/phlox/comp/drag_point.cljs
index 79cca50..27e75a0 100644
--- a/src/phlox/comp/drag_point.cljs
+++ b/src/phlox/comp/drag_point.cljs
@@ -33,7 +33,7 @@
    {:check-keys? true}))
 
 (defn comp-drag-point [cursor states props]
-  (dev-check cursor (vector+ (or (keyword+) (number+))))
+  (dev-check cursor (vector+ (any+ {:some? true})))
   (dev-check props lilac-drag-point)
   (let [state (or (:data states) {:dragging false, :x0 [0 0]})
         unit (or (:unit props) 1)
diff --git a/src/phlox/comp/slider.cljs b/src/phlox/comp/slider.cljs
index 2de4ee1..91c6969 100644
--- a/src/phlox/comp/slider.cljs
+++ b/src/phlox/comp/slider.cljs
@@ -35,7 +35,7 @@
 (defcomp
  comp-slider
  (cursor states props)
- (dev-check cursor (vector+ (or (keyword+) (number+))))
+ (dev-check cursor (vector+ (any+ {:some? true})))
  (dev-check props lilac-slider)
  (let [value (or (:value props) 1)
        state (or (:data states) {:v0 value, :x0 0, :dragging? false})