diff --git a/docs/assembly.rst b/docs/assembly.rst
index ec3f6ef..739ab2b 100644
--- a/docs/assembly.rst
+++ b/docs/assembly.rst
@@ -250,11 +250,11 @@ In the grammar, opcodes are represented as pre-defined identifiers.
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | address                 |     | F | address of the current contract / execution context             |
 +-------------------------+-----+---+-----------------------------------------------------------------+
-| balance(a)              |     | F | lu balance at address a                                        |
+| balance(a)              |     | F | lu balance at address a                                         |
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | caller                  |     | F | call sender (excluding ``delegatecall``)                        |
 +-------------------------+-----+---+-----------------------------------------------------------------+
-| callvalue               |     | F | lu sent together with the current call                         |
+| callvalue               |     | F | lu sent together with the current call                          |
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | calldataload(p)         |     | F | call data starting from position p (32 bytes)                   |
 +-------------------------+-----+---+-----------------------------------------------------------------+
@@ -274,15 +274,15 @@ In the grammar, opcodes are represented as pre-defined identifiers.
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | returndatacopy(t, f, s) | `-` | B | copy s bytes from returndata at position f to mem at position t |
 +-------------------------+-----+---+-----------------------------------------------------------------+
-| create(v, p, s)         |     | F | create new contract with code mem[p..(p+s)) and send v lu      |
+| create(v, p, s)         |     | F | create new contract with code mem[p..(p+s)) and send v lu       |
 |                         |     |   | and return the new address                                      |
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | create2(v, n, p, s)     |     | C | create new contract with code mem[p..(p+s)) at address          |
 |                         |     |   | keccak256(<address> . n . keccak256(mem[p..(p+s))) and send v   |
-|                         |     |   | lu and return the new address                                  |
+|                         |     |   | lu and return the new address                                   |
 +-------------------------+-----+---+-----------------------------------------------------------------+
 | call(g, a, v, in,       |     | F | call contract at address a with input mem[in..(in+insize))      |
-| insize, out, outsize)   |     |   | providing g gas and v lu and output area                       |
+| insize, out, outsize)   |     |   | providing g gas and v lu and output area                        |
 |                         |     |   | mem[out..(out+outsize)) returning 0 on error (eg. out of gas)   |
 |                         |     |   | and 1 on success                                                |
 +-------------------------+-----+---+-----------------------------------------------------------------+
diff --git a/docs/julia.rst b/docs/julia.rst
index 6bbe958..3638f4d 100644
--- a/docs/julia.rst
+++ b/docs/julia.rst
@@ -411,11 +411,11 @@ The following functions must be available:
 +---------------------------------------------+-----------------------------------------------------------------+
 | *Execution control*                                                                                           |
 +---------------------------------------------+-----------------------------------------------------------------+
-| create(v:u256, p:u256, s:u256)              | create new contract with code mem[p..(p+s)) and send v lu      |
+| create(v:u256, p:u256, s:u256)              | create new contract with code mem[p..(p+s)) and send v lu       |
 |                                             | and return the new address                                      |
 +---------------------------------------------+-----------------------------------------------------------------+
 | call(g:u256, a:u256, v:u256, in:u256,       | call contract at address a with input mem[in..(in+insize))      |
-| insize:u256, out:u256,                      | providing g gas and v lu and output area                       |
+| insize:u256, out:u256,                      | providing g gas and v lu and output area                        |
 | outsize:u256)                               | mem[out..(out+outsize)) returning 0 on error (eg. out of gas)   |
 | -> r:u256                                   | and 1 on success                                                |
 +---------------------------------------------+-----------------------------------------------------------------+
@@ -465,13 +465,13 @@ The following functions must be available:
 +---------------------------------------------+-----------------------------------------------------------------+
 | gasleft() -> gas:u256                       | gas still available to execution                                |
 +---------------------------------------------+-----------------------------------------------------------------+
-| balance(a:u256) -> v:u256                   | lu balance at address a                                        |
+| balance(a:u256) -> v:u256                   | lu balance at address a                                         |
 +---------------------------------------------+-----------------------------------------------------------------+
 | this() -> address:u256                      | address of the current contract / execution context             |
 +---------------------------------------------+-----------------------------------------------------------------+
 | caller() -> address:u256                    | call sender (excluding delegatecall)                            |
 +---------------------------------------------+-----------------------------------------------------------------+
-| callvalue() -> v:u256                       | lu sent together with the current call                         |
+| callvalue() -> v:u256                       | lu sent together with the current call                          |
 +---------------------------------------------+-----------------------------------------------------------------+
 | calldataload(p:u256) -> v:u256              | call data starting from position p (32 bytes)                   |
 +---------------------------------------------+-----------------------------------------------------------------+
diff --git a/scripts/install_cmake.sh b/scripts/install_cmake.sh
index e334b2c..47ccf32 100755
--- a/scripts/install_cmake.sh
+++ b/scripts/install_cmake.sh
@@ -23,17 +23,20 @@ PATH=$PREFIX/bin:$PATH
 if test -f $BIN/cmake && ($BIN/cmake --version | grep -q "$VERSION"); then
     echo "CMake $VERSION already installed in $BIN"
 else
+    WORKSPACE=/root/project
     FILE=cmake-$VERSION-$OS-x86_64.tar.gz
-    URL=https://cmake.org/files/v3.7/$FILE
-    ERROR=0
-    TMPFILE=$(mktemp --tmpdir cmake-$VERSION-$OS-x86_64.XXXXXXXX.tar.gz)
-    echo "Downloading CMake ($URL)..."
-    wget "$URL" -O "$TMPFILE" -nv
+    TMPFILE=$WORKSPACE/deps/downloads/$FILE
+    if ! test -f $TMPFILE ; then
+        URL=https://cmake.org/files/v3.7/$FILE
+        ERROR=0
+        echo "Downloading CMake ($URL)..."
+        wget "$URL" -O "$TMPFILE" -nv
+    fi
     if ! (shasum -a256 "$TMPFILE" | grep -q "$SHA256"); then
         echo "Checksum mismatch ($TMPFILE)"
+        rm $TMPFILE
         exit 1
     fi
     mkdir -p "$PREFIX"
     tar xzf "$TMPFILE" -C "$PREFIX" --strip 1
-    rm $TMPFILE
 fi
diff --git a/scripts/travis-emscripten/build_emscripten.sh b/scripts/travis-emscripten/build_emscripten.sh
index f49ff5b..a3b7f6a 100755
--- a/scripts/travis-emscripten/build_emscripten.sh
+++ b/scripts/travis-emscripten/build_emscripten.sh
@@ -34,6 +34,12 @@
 
 set -ev
 
+#--------------------------------------------------------------
+# Update package source list.
+#--------------------------------------------------------------
+sed -i 's/httpredir.debian.org/mirrors.ustc.edu.cn/g' /etc/apt/sources.list
+sed -i 's|security.debian.org|mirrors.ustc.edu.cn/debian-security|g' /etc/apt/sources.list
+
 if ! type git &>/dev/null; then
     # We need git for extracting the commit hash
     apt-get update