diff --git a/build-dendritejs.sh b/build-dendritejs.sh
index cd42a6be..83ec3699 100755
--- a/build-dendritejs.sh
+++ b/build-dendritejs.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -eu
+#!/bin/sh -eu
 
 export GIT_COMMIT=$(git rev-list -1 HEAD) && \
-GOOS=js GOARCH=wasm go build -ldflags "-X main.GitCommit=$GIT_COMMIT" -o main.wasm ./cmd/dendritejs
\ No newline at end of file
+GOOS=js GOARCH=wasm go build -ldflags "-X main.GitCommit=$GIT_COMMIT" -o main.wasm ./cmd/dendritejs
diff --git a/build.sh b/build.sh
index 31e0519f..494d97ed 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash -eu
+#!/bin/sh -eu
 
 # Put installed packages into ./bin
 export GOBIN=$PWD/`dirname $0`/bin
@@ -7,7 +7,7 @@ if [ -d ".git" ]
 then
     export BUILD=`git rev-parse --short HEAD || ""`
     export BRANCH=`(git symbolic-ref --short HEAD | tr -d \/ ) || ""`
-    if [[ $BRANCH == "master" ]]
+    if [ "$BRANCH" = master ]
     then
         export BRANCH=""
     fi