diff --git a/.travis.yml b/.travis.yml
index 0c620810..4ca4c6fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,11 +4,11 @@ os:
   - linux
   - osx
 julia:
-  - release
+  # - release
   - nightly
-matrix:
-  allow_failures:
-    - julia: nightly
+# matrix:
+#   allow_failures:
+#     - julia: nightly
 
 # # before install:
 # #   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update          ; fi
diff --git a/src/Plots.jl b/src/Plots.jl
index 27bf5d45..424b632f 100644
--- a/src/Plots.jl
+++ b/src/Plots.jl
@@ -34,6 +34,7 @@ export
 
     plot,
     plot!,
+    update!,
 
     current,
     default,
diff --git a/src/utils.jl b/src/utils.jl
index 0eac3360..a5f5b588 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -686,9 +686,17 @@ function push_z!(series::Series, zi)
     return
 end
 
+function Base.push!(series::Series, yi)
+    x = extendSeriesByOne(series[:x])
+    expand_extrema!(series[:subplot][:xaxis], x[end])
+    series[:x] = x
+    push_y!(series, yi)
+end
 Base.push!(series::Series, xi, yi) = (push_x!(series,xi); push_y!(series,yi))
 Base.push!(series::Series, xi, yi, zi) = (push_x!(series,xi); push_y!(series,yi); push_z!(series,zi))
 
+# -------------------------------------------------------
+
 function update!(series::Series; kw...)
     d = KW(kw)
     preprocessArgs!(d)
@@ -700,6 +708,20 @@ function update!(series::Series; kw...)
         end
     end
     _series_updated(series[:subplot].plt, series)
+    series
+end
+
+function update!(sp::Subplot; kw...)
+    d = KW(kw)
+    preprocessArgs!(d)
+    for (k,v) in d
+        if haskey(_subplot_defaults, k)
+            sp[k] = v
+        else
+            warn("unused key $k in subplot update")
+        end
+    end
+    sp
 end
 
 # -------------------------------------------------------