diff --git a/DESCRIPTION b/DESCRIPTION
index 3876a1af..2853d8f5 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: tsibble
 Type: Package
 Title: Tidy Temporal Data Frames and Tools
-Version: 0.1.2.9999
+Version: 0.1.3
 Date: 2018-01-27
 Authors@R: c(
     person("Earo", "Wang", email = "earo.wang@gmail.com", role = c("aut", "cre")),
diff --git a/NEWS.md b/NEWS.md
index 0d14baf0..594c11d8 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,4 @@
-# tsibble 0.1.2.9999
+# tsibble 0.1.3
 
 ## New functions
 
diff --git a/R/tsummarise.R b/R/tsummarise.R
index 49608217..fe99797c 100644
--- a/R/tsummarise.R
+++ b/R/tsummarise.R
@@ -158,7 +158,8 @@ tsum <- function(.data, first, remainder = NULL, FUN = summarise) {
   }
   if (is.null(remainder)) { # summarise_*()
     nonkey <- setdiff(flatten_key(key(.data)), flat_grps)
-    grped_data <- select(grped_data, - !! nonkey)
+    sel_cols <- setdiff(names(grped_data), nonkey)
+    grped_data <- select(grped_data, !! sel_cols)
     result <- FUN(grped_data)
   } else { # summarise()
     result <- FUN(grped_data, !!! remainder)
diff --git a/README.Rmd b/README.Rmd
index 3dc89cc7..f41ccef9 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -73,7 +73,7 @@ full_weather
 
 ### `tsummarise()` to summarise over calendar periods
 
-`tsummarise()` and its scoped variants (including `_all()`, `_at()`, `_if()`) are introduced to aggregate interested variables over calendar periods. `tsummarise()` goes hand in hand with the index functions including `as.Date()`, `yearmonth()`, and `yearquarter()`, as well as other friends from *lubridate*, such as `year()` and `ceiling_date()`. For example, it would be of interest in computing average temperature and total precipitation per month, by applying `yearmonth()` to the hourly time index.
+`tsummarise()` and its scoped variants (including `_all()`, `_at()`, `_if()`) are introduced to aggregate interested variables over calendar periods. `tsummarise()` goes hand in hand with the index functions including `as.Date()`, `yearmonth()`, and `yearquarter()`, as well as other friends from *lubridate*, such as `year()`, `ceiling_date()`, `floor_date()` and `round_date()`. For example, it would be of interest in computing average temperature and total precipitation per month, by applying `yearmonth()` to the hourly time index.
 
 ```{r tsummarise}
 full_weather %>%
@@ -93,7 +93,7 @@ Temporal data often involves moving window calculations. Several functions in th
 
 * `slide()`: sliding window with overlapping observations.
 * `tile()`: tiling window without overlapping observations.
-* `stretch()`: fixing an initial window and expanding more observations.
+* `stretch()`: fixing an initial window and expanding to include more observations.
 
 For example, a moving average of window size 3 is carried out on hourly temperatures for each group (*origin*).
 
diff --git a/README.md b/README.md
index d95bf393..454add3d 100644
--- a/README.md
+++ b/README.md
@@ -108,10 +108,10 @@ preserves time zones for date-times.
 `_if()`) are introduced to aggregate interested variables over calendar
 periods. `tsummarise()` goes hand in hand with the index functions
 including `as.Date()`, `yearmonth()`, and `yearquarter()`, as well as
-other friends from *lubridate*, such as `year()` and `ceiling_date()`.
-For example, it would be of interest in computing average temperature
-and total precipitation per month, by applying `yearmonth()` to the
-hourly time index.
+other friends from *lubridate*, such as `year()`, `ceiling_date()`,
+`floor_date()` and `round_date()`. For example, it would be of interest
+in computing average temperature and total precipitation per month, by
+applying `yearmonth()` to the hourly time index.
 
 ``` r
 full_weather %>%
@@ -144,7 +144,7 @@ windows using purrr-like syntax:
 
   - `slide()`: sliding window with overlapping observations.
   - `tile()`: tiling window without overlapping observations.
-  - `stretch()`: fixing an initial window and expanding more
+  - `stretch()`: fixing an initial window and expanding to include more
     observations.
 
 For example, a moving average of window size 3 is carried out on hourly
diff --git a/docs/articles/index.html b/docs/articles/index.html
index 25b7012e..b1e13750 100644
--- a/docs/articles/index.html
+++ b/docs/articles/index.html
@@ -87,7 +87,7 @@
       </header>
 
       <div class="page-header">
-  <h1>Articles <small>version&nbsp;0.1.2.9999</small></h1>
+  <h1>Articles <small>version&nbsp;0.1.3</small></h1>
 </div>
 
 <div class="row">
diff --git a/docs/index.html b/docs/index.html
index 25eca2fa..b1a53563 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -123,7 +123,7 @@
 <p><code><a href="reference/fill-na.html">fill_na()</a></code> also handles filling <code>NA</code> by values or functions, and preserves time zones for date-times.</p>
 </section><section id="tsummarise-to-summarise-over-calendar-periods" class="level3"><h3>
 <code><a href="reference/tsummarise.html">tsummarise()</a></code> to summarise over calendar periods</h3>
-<p><code><a href="reference/tsummarise.html">tsummarise()</a></code> and its scoped variants (including <code>_all()</code>, <code>_at()</code>, <code>_if()</code>) are introduced to aggregate interested variables over calendar periods. <code><a href="reference/tsummarise.html">tsummarise()</a></code> goes hand in hand with the index functions including <code>as.Date()</code>, <code><a href="reference/period.html">yearmonth()</a></code>, and <code><a href="reference/period.html">yearquarter()</a></code>, as well as other friends from <em>lubridate</em>, such as <code>year()</code> and <code>ceiling_date()</code>. For example, it would be of interest in computing average temperature and total precipitation per month, by applying <code><a href="reference/period.html">yearmonth()</a></code> to the hourly time index.</p>
+<p><code><a href="reference/tsummarise.html">tsummarise()</a></code> and its scoped variants (including <code>_all()</code>, <code>_at()</code>, <code>_if()</code>) are introduced to aggregate interested variables over calendar periods. <code><a href="reference/tsummarise.html">tsummarise()</a></code> goes hand in hand with the index functions including <code>as.Date()</code>, <code><a href="reference/period.html">yearmonth()</a></code>, and <code><a href="reference/period.html">yearquarter()</a></code>, as well as other friends from <em>lubridate</em>, such as <code>year()</code>, <code>ceiling_date()</code>, <code>floor_date()</code> and <code>round_date()</code>. For example, it would be of interest in computing average temperature and total precipitation per month, by applying <code><a href="reference/period.html">yearmonth()</a></code> to the hourly time index.</p>
 <div class="sourceCode" id="cb5"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb5-1" data-line-number="1">full_weather <span class="op">%&gt;%</span></a>
 <a class="sourceLine" id="cb5-2" data-line-number="2"><span class="st">  </span><span class="kw"><a href="http://dplyr.tidyverse.org/reference/group_by.html">group_by</a></span>(origin) <span class="op">%&gt;%</span></a>
 <a class="sourceLine" id="cb5-3" data-line-number="3"><span class="st">  </span><span class="kw"><a href="reference/tsummarise.html">tsummarise</a></span>(</a>
@@ -151,7 +151,7 @@
 <li>
 <code><a href="reference/tile.html">tile()</a></code>: tiling window without overlapping observations.</li>
 <li>
-<code><a href="reference/stretch.html">stretch()</a></code>: fixing an initial window and expanding more observations.</li>
+<code><a href="reference/stretch.html">stretch()</a></code>: fixing an initial window and expanding to include more observations.</li>
 </ul>
 <p>For example, a moving average of window size 3 is carried out on hourly temperatures for each group (<em>origin</em>).</p>
 <div class="sourceCode" id="cb6"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb6-1" data-line-number="1">full_weather <span class="op">%&gt;%</span><span class="st"> </span></a>
diff --git a/docs/news/index.html b/docs/news/index.html
index 17825673..7cad09d2 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -95,7 +95,7 @@ <h1>Change log <small>All releases</small></h1>
 
     <div class="contents">
     <div class="section level1">
-<h1>tsibble 0.1.2.9999</h1>
+<h1>tsibble 0.1.3</h1>
 <div class="section level2">
 <h2>New functions</h2>
 <ul>
@@ -180,7 +180,7 @@ <h1>tsibble 0.0.1</h1>
     <div id="tocnav">
       <h2>Contents</h2>
       <ul class="nav nav-pills nav-stacked">
-        <li><a href="#NA">0.1.2.9999</a></li>
+        <li><a href="#NA">0.1.3</a></li>
         <li><a href="#NA">0.1.2</a></li>
         <li><a href="#NA">0.1.0</a></li>
         <li><a href="#NA">0.0.1</a></li>
diff --git a/docs/reference/index.html b/docs/reference/index.html
index 7c2bd42a..95ff68b0 100644
--- a/docs/reference/index.html
+++ b/docs/reference/index.html
@@ -91,7 +91,7 @@
     <div class="page-header">
       <h1>
         Reference
-        <small>version&nbsp;0.1.2.9999</small>
+        <small>version&nbsp;0.1.3</small>
       </h1>
     </div>
 
diff --git a/docs/reference/tsummarise.html b/docs/reference/tsummarise.html
index 28bcbbb7..812cb851 100644
--- a/docs/reference/tsummarise.html
+++ b/docs/reference/tsummarise.html
@@ -197,7 +197,7 @@ <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examp
 #&gt; 10 Birrarung Marr   2015 Oct      7085      1.00
 #&gt; # ... with 85 more rows</div><div class='input'><span class='fu'><a href='index-rd.html'>index</a></span>(<span class='no'>monthly_ped</span>)</div><div class='output co'>#&gt; &lt;quosure&gt;
 #&gt;   expr: ^Year_Month
-#&gt;   env:  0x7f9a040e3988</div><div class='input'>
+#&gt;   env:  0x7fb641d18358</div><div class='input'>
 <span class='co'># Annual trips by Region and State ----</span>
 <span class='fu'>data</span>(<span class='no'>tourism</span>)
 <span class='no'>tourism</span> <span class='kw'>%&gt;%</span>