diff --git a/conda-recipes/llvmdev/bld.bat b/conda-recipes/llvmdev/bld.bat
index 8b82c6480..6a6e39a78 100644
--- a/conda-recipes/llvmdev/bld.bat
+++ b/conda-recipes/llvmdev/bld.bat
@@ -27,7 +27,7 @@ cmake -G "Ninja" ^
     -DCMAKE_INSTALL_PREFIX:PATH=%LIBRARY_PREFIX% ^
     -DLLVM_USE_INTEL_JITEVENTS=ON ^
     -DLLVM_ENABLE_LIBXML2=FORCE_ON ^
-    -DLLVM_ENABLE_RTTI=ON ^
+    -DLLVM_ENABLE_RTTI=OFF ^
     -DLLVM_ENABLE_ZLIB=FORCE_ON ^
     -DLLVM_ENABLE_ZSTD=FORCE_ON ^
     -DLLVM_INCLUDE_BENCHMARKS=OFF ^
diff --git a/conda-recipes/llvmdev/build.sh b/conda-recipes/llvmdev/build.sh
index c9e06ad03..6d829fc89 100644
--- a/conda-recipes/llvmdev/build.sh
+++ b/conda-recipes/llvmdev/build.sh
@@ -41,7 +41,8 @@ cmake -DCMAKE_INSTALL_PREFIX="${PREFIX}" \
       -DCMAKE_LIBRARY_PATH="${PREFIX}" \
       -DLLVM_ENABLE_LIBEDIT=OFF \
       -DLLVM_ENABLE_LIBXML2=OFF \
-      -DLLVM_ENABLE_RTTI=ON \
+      -DLLVM_ENABLE_RTTI=OFF \
+      -DLLVM_ENABLE_ASSERTIONS=ON \
       -DLLVM_ENABLE_TERMINFO=OFF \
       -DLLVM_INCLUDE_BENCHMARKS=OFF \
       -DLLVM_INCLUDE_DOCS=OFF \
diff --git a/conda-recipes/llvmdev/meta.yaml b/conda-recipes/llvmdev/meta.yaml
index e6a2ad75c..e6bccd88e 100644
--- a/conda-recipes/llvmdev/meta.yaml
+++ b/conda-recipes/llvmdev/meta.yaml
@@ -1,6 +1,6 @@
 {% set shortversion = "20.1" %}
-{% set version = "20.1.5" %}
-{% set sha256_llvm = "a069565cd1c6aee48ee0f36de300635b5781f355d7b3c96a28062d50d575fa3e" %}
+{% set version = "20.1.8" %}
+{% set sha256_llvm = "6898f963c8e938981e6c4a302e83ec5beb4630147c7311183cf61069af16333d" %}
 {% set build_number = "0" %}
 
 package:
diff --git a/conda-recipes/llvmdev_for_wheel/bld.bat b/conda-recipes/llvmdev_for_wheel/bld.bat
index 748188519..a7cadc08e 100644
--- a/conda-recipes/llvmdev_for_wheel/bld.bat
+++ b/conda-recipes/llvmdev_for_wheel/bld.bat
@@ -27,7 +27,7 @@ cmake -G "Ninja" ^
     -DCMAKE_INSTALL_PREFIX:PATH=%LIBRARY_PREFIX% ^
     -DLLVM_USE_INTEL_JITEVENTS=ON ^
     -DLLVM_ENABLE_LIBXML2=OFF ^
-    -DLLVM_ENABLE_RTTI=ON ^
+    -DLLVM_ENABLE_RTTI=OFF ^
     -DLLVM_ENABLE_ZLIB=OFF ^
     -DLLVM_ENABLE_ZSTD=OFF ^
     -DLLVM_INCLUDE_BENCHMARKS=OFF ^
diff --git a/conda-recipes/llvmdev_for_wheel/build.sh b/conda-recipes/llvmdev_for_wheel/build.sh
index f39a8991b..3c4752057 100644
--- a/conda-recipes/llvmdev_for_wheel/build.sh
+++ b/conda-recipes/llvmdev_for_wheel/build.sh
@@ -45,7 +45,8 @@ cmake -DCMAKE_INSTALL_PREFIX="${PREFIX}" \
       -DLLVM_ENABLE_ZSTD=OFF \
       -DLLVM_ENABLE_LIBEDIT=OFF \
       -DLLVM_ENABLE_LIBXML2=OFF \
-      -DLLVM_ENABLE_RTTI=ON \
+      -DLLVM_ENABLE_RTTI=OFF \
+      -DLLVM_ENABLE_ASSERTIONS=ON \
       -DLLVM_ENABLE_TERMINFO=OFF \
       -DLLVM_INCLUDE_BENCHMARKS=OFF \
       -DLLVM_INCLUDE_DOCS=OFF \
diff --git a/conda-recipes/llvmdev_for_wheel/meta.yaml b/conda-recipes/llvmdev_for_wheel/meta.yaml
index 69561b6f4..752574011 100644
--- a/conda-recipes/llvmdev_for_wheel/meta.yaml
+++ b/conda-recipes/llvmdev_for_wheel/meta.yaml
@@ -1,7 +1,7 @@
 # This file is a copy of ../llvmdev/meta.yaml with minor changes for wheel # building
-{% set shortversion = "15.0" %}
-{% set version = "15.0.7" %}
-{% set sha256_llvm = "8b5fcb24b4128cf04df1b0b9410ce8b1a729cb3c544e6da885d234280dedeac6" %}
+{% set shortversion = "20.1" %}
+{% set version = "20.1.8" %}
+{% set sha256_llvm = "6898f963c8e938981e6c4a302e83ec5beb4630147c7311183cf61069af16333d" %}
 {% set build_number = "1" %}
 
 package: