diff --git a/.Rbuildignore b/.Rbuildignore
index 1a99162b..81cc5946 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -33,4 +33,5 @@ README\.html
 \.gitattributes
 
 paper\..+
-docker
\ No newline at end of file
+docker
+\.devcontainer
diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 6319e186..88cea499 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -12,4 +12,7 @@ RUN \
   wget https://github.com/jgm/pandoc/releases/download/3.2.1/pandoc-3.2.1-1-amd64.deb && \
   dpkg -i pandoc-3.2.1-1-amd64.deb
 
-RUN install2.r cpp11 rmarkdown roxygen2 tinytest data.table netplot
\ No newline at end of file
+RUN install2.r cpp11 rmarkdown roxygen2 tinytest data.table netplot
+
+RUN apt install -y --no-install-recommends libxml2-dev && \
+  install2.r languageserver
\ No newline at end of file
diff --git a/README.md b/README.md
index 270a5067..8c19d6c4 100644
--- a/README.md
+++ b/README.md
@@ -137,8 +137,8 @@ summary(sir)
 #> Number of entities  : 0
 #> Days (duration)     : 50 (of 50)
 #> Number of viruses   : 1
-#> Last run elapsed t  : 147.00ms
-#> Last run speed      : 33.83 million agents x day / second
+#> Last run elapsed t  : 134.00ms
+#> Last run speed      : 37.07 million agents x day / second
 #> Rewiring            : off
 #> 
 #> Global events:
@@ -219,8 +219,8 @@ summary(model_seirconn)
 #> Number of entities  : 0
 #> Days (duration)     : 100 (of 100)
 #> Number of viruses   : 2
-#> Last run elapsed t  : 80.00ms
-#> Last run speed      : 12.38 million agents x day / second
+#> Last run elapsed t  : 81.00ms
+#> Last run speed      : 12.21 million agents x day / second
 #> Rewiring            : off
 #> 
 #> Global events: