diff --git a/scripts/ABC-dbUtilities.R b/scripts/ABC-dbUtilities.R
index 4fefa61..d937222 100644
--- a/scripts/ABC-dbUtilities.R
+++ b/scripts/ABC-dbUtilities.R
@@ -15,13 +15,13 @@ if (! require(jsonlite, quietly = TRUE)) {
 }
 
 
-if (!require(httr, quietly = TRUE)) {
+if (! require(httr, quietly = TRUE)) {
   install.packages("httr")
   library(httr)
 }
 
 
-if (!require(xml2, quietly = TRUE)) {
+if (! require(xml2, quietly = TRUE)) {
   install.packages("xml2")
   library(xml2)
 }
diff --git a/scripts/ABC-makeMYSPElist.R b/scripts/ABC-makeMYSPElist.R
index 9dc0848..8d44f06 100644
--- a/scripts/ABC-makeMYSPElist.R
+++ b/scripts/ABC-makeMYSPElist.R
@@ -70,7 +70,7 @@
 #  (https://gold.jgi.doe.gov/). Use the data that is hosted at the NCBI.
 
 # ==   2.1  Initialize  ========================================================
-if (!require(httr)) { # httr provides interfaces to Webservers on the Internet
+if (! require(httr)) { # httr provides interfaces to Webservers on the Internet
     install.packages("httr")
     library(httr)
 }
diff --git a/scripts/ABC-makeScCCnet.R b/scripts/ABC-makeScCCnet.R
index 6abed47..a19fd83 100644
--- a/scripts/ABC-makeScCCnet.R
+++ b/scripts/ABC-makeScCCnet.R
@@ -28,7 +28,7 @@
 #
 # ==============================================================================
 
-if (!require(readr, quietly = TRUE)) {
+if (! require(readr, quietly = TRUE)) {
   install.packages("readr")
   library(readr)
 }
diff --git a/scripts/BLAST.R b/scripts/BLAST.R
index a4a6f12..cbc8d7d 100644
--- a/scripts/BLAST.R
+++ b/scripts/BLAST.R
@@ -28,7 +28,7 @@
 # ==============================================================================
 
 
-if (!require(httr, quietly = TRUE)) {
+if (! require(httr, quietly = TRUE)) {
   install.packages("httr")
   library(httr)
 }